Technical SEO Warnings Guide

Master the technical aspects of SEO with our comprehensive warning reference

Common Technical SEO Issues

Technical SEO forms the foundation of your site's search engine visibility. These warnings help you identify and resolve issues that could be preventing your content from ranking effectively.

Content Analyzer

Expand Your Content to Boost SEO and User Engagement

Think of your webpage as a conversation with your visitor. If it's too short, it's like giving a one-word answer—it's not very helpful! Search engines like Google prefer pages with substantial,...

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Improve Readability by Varying Sentence Structure

Your content is using a lot of very short, simple sentences. While easy to read, too many of them can make your writing feel robotic and choppy. It's better to have a nice rhythm with a mix of...

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Break Up Long Paragraphs for Better Online Readability

This page has some really long paragraphs. On the web, people tend to scan pages rather than read every single word. A giant wall of text can be intimidating and cause them to click away. Breaking...

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Avoid Keyword Stuffing for Better SEO and User Trust

This page seems to be repeating the same keywords over and over. This is an outdated SEO tactic called 'keyword stuffing,' and it can get you penalized by search engines. More importantly, it...

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Boost Your Content's Visibility by Improving the Text-to-HTML Ratio

This page has a lot more code (HTML) than actual readable text. Search engines need text to figure out what your page is about. If there's too much code and not enough content, they might struggle...

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Make Your Content Easier to Read for Users and SEO

The writing on this page is a bit hard to follow. This can happen when sentences are too long and complex, or when you use a lot of jargon. If your visitors have to struggle to understand your...

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Fix Duplicate Content Issues to Improve SEO Rankings

This page has content that's very similar or identical to content on other pages (either on your site or elsewhere). This confuses search engines. They don't know which page to show in search...

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CSS Analyzer

Fix Missing Stylesheet URL to Restore Site Appearance

Your website's design is defined by a CSS stylesheet, but there's a problem: the link to it is broken. It's like having a map with no destination. Because the browser can't find the CSS file, your...

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Speed Up Page Load by Preloading Critical CSS

One of your most important stylesheets is making your page load slowly because it's not being prioritized. You can tell the browser to fetch this file earlier by 'preloading' it. This simple...

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Improve Page Speed by Moving Large Inline CSS to an External File

Your page has a very large chunk of CSS code embedded directly in the HTML. This is called an 'inline stylesheet.' While it works, it makes your HTML file bigger and slower to download. Moving...

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Clean Up Your Code by Replacing Inline Styles with CSS Classes

Your page has a lot of styling applied directly to individual HTML elements using the `style="..."` attribute. This makes your code cluttered and hard to update. Imagine having to change the color...

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Avoid Using `!important` in CSS for Better Style Management

Your CSS is using the `!important` rule. Think of this as the 'nuclear option' for styling—it overrides everything else. While it can be a tempting quick fix, it makes your code very difficult to...

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Modernize Your CSS by Removing Outdated Vendor Prefixes

Your stylesheet includes old 'vendor prefixes' (like `-webkit-` or `-moz-`). These were used in the past to make new CSS features work in specific browsers. Today, most of these are no longer...

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Strengthen Your Brand with a Consistent Color Palette

Your website uses a very wide range of colors, which can make it feel disjointed and unprofessional. A consistent and well-chosen color palette is crucial for building a strong brand identity and...

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Improve Accessibility and Consistency with a Unified CSS Unit Strategy

Your CSS is using a mix of different units for measurements (`px`, `em`, `rem`, etc.). This can cause your design to look inconsistent, especially for users who change their browser's default font...

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Implement Responsive Design to Ensure Your Site is Mobile-Friendly

Your webpage doesn't adjust its layout for different screen sizes. This means it might look great on a desktop but be very difficult to use on a mobile phone. Since most people browse the web on...

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Ensure Readability by Setting Background Color with Text Color

You've set a specific color for some text on your page but haven't set a background color for it. This can be risky. If a user has a custom browser theme (like a high-contrast mode), your white...

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Increase Font Size for Better Mobile Readability and Accessibility

The text on your page is too small for comfortable reading on a mobile phone. This forces users to pinch and zoom, which is a frustrating experience. It's also an accessibility issue for people...

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Eliminate Render-Blocking CSS to Drastically Improve Page Speed

Your page is being slowed down by 'render-blocking' stylesheets. This means the browser has to stop everything and wait for your CSS files to download before it can show anything to the user. This...

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Streamline Your Code by Consolidating Print Stylesheets

Your page is loading multiple stylesheets just for printing. This is inefficient. All the styles needed to make your page look good when printed should be combined into a single file. This makes...

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Optimize Your CSS by Merging Duplicate Selectors

Your stylesheets define the same CSS selector (like `.example-class`) in multiple places. This makes your code repetitive and larger than it needs to be. Combining these into a single, unified...

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External Link Analyzer

Fixing Broken External Links to Improve SEO

When a user clicks on a link on your website that leads to another site, they expect it to work. If it doesn't, it's like a broken promise. This is what we call a 'broken external link.' It means...

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Resolving Unreachable External Links for Better User Experience

Sometimes, a link on your site might be perfectly valid, but our analyzer (and potentially your users) can't reach it. This can happen for a few reasons: the other website might be temporarily...

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Internationalization Analyzer

Use Valid Language Codes for Better SEO and Accessibility

You've told browsers and search engines what language your page is in, but the code you used isn't standard. This can confuse them, potentially hurting your SEO and causing issues for screen...

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Add a `lang` Attribute to Improve SEO and Accessibility

Your page is missing a simple but important piece of information: the `lang` attribute. This tells search engines and browsers what language the content is written in. Without it, search engines...

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Resolve Conflicting Language Declarations for Clearer SEO Signals

Your page is sending mixed signals about its language. You have a `lang` attribute saying one thing and a `content-language` meta tag saying another. This can confuse search engines. It's best to...

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Clean Up Duplicate `hreflang` Tags to Avoid SEO Confusion

Your page has multiple `hreflang` tags pointing to different URLs for the same language. This is like giving someone two different addresses for the same house—it's confusing! Search engines might...

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Fix Invalid URLs in `hreflang` Tags to Improve International SEO

One of your `hreflang` tags, which tells Google about different language versions of your page, is pointing to a broken or invalid URL. This means search engines can't find the alternate language...

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Add `x-default` `hreflang` for Better International Targeting

Your page has versions for different languages, but you haven't specified a default page for users whose language doesn't match any of them. The `x-default` `hreflang` attribute does just...

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Switch to UTF-8 Character Set for Universal Compatibility

Your page is using an outdated or uncommon character set to encode its text. This can cause special characters, like accents or emojis, to display incorrectly. The modern web standard is UTF-8,...

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Declare a Character Set to Prevent Text Display Issues

Your page hasn't declared a character set. This means you're leaving it up to the browser to guess how to display your text. If it guesses wrong, your users could see garbled text or weird symbols...

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Enable RTL Support for Right-to-Left Languages

Your page is written in a language that reads from right to left (like Arabic or Hebrew), but you haven't enabled the proper setting for it. This can make your layout look broken and your text...

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Standardize Date Formats for a Better User Experience

Your page is displaying dates in several different formats (e.g., '12/25/2023', 'Dec 25, 2023', '2023-12-25'). This can be confusing for users, especially in an international context where date...

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Remove Untranslated Content Markers Before Publishing

Your page appears to have placeholder text (like '[TRANSLATE ME]') that indicates some content hasn't been translated yet. This looks unprofessional and can confuse users. It's important to ensure...

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Add Timezones to Datetime Attributes for Clarity

Your page includes a date and time but doesn't specify the timezone. This can be very confusing for a global audience. Is '9:00 AM' in the morning in New York, London, or Tokyo? Specifying a...

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JavaScript Analyzer

Optimize Script Loading to Prevent Page Rendering Delays

Your page has a JavaScript file that's making visitors wait. It's called a 'render-blocking script' because the browser has to stop building the page to download and run it. This delay means a...

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Clarify Script Loading by Removing Redundant `async` and `defer`

A script on your page has both the `async` and `defer` attributes. This is confusing for the browser. While it won't break your site (browsers will typically just use `async`), it's messy code....

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Modernize Your HTML by Removing Unnecessary Script `type` Attributes

Your script tags have a `type="text/javascript"` attribute. This hasn't been necessary for years, as JavaScript is the default language for scripts on the web. It's just extra clutter in your...

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Optimize JavaScript Module Loading

You're using a modern JavaScript module, but you haven't specified how it should load. By default, modules are deferred, but it's a good practice to be explicit. If the module can run...

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Correct Unknown Script `type` for Proper Execution

A script on your page has a `type` attribute that the browser doesn't recognize. This will cause the browser to ignore the script completely, meaning its functionality will be missing from your...

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Preload Critical Scripts to Improve Page Load Performance

An important JavaScript file is being discovered late by the browser, which delays the interactivity of your page. You can give the browser a heads-up to download this file sooner by 'preloading'...

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Avoid Synchronous Scripts in <head> to Speed Up Rendering

You have a script in the <head> of your page that is loaded synchronously (without `async` or `defer`). This is a major performance bottleneck, as it forces the browser to stop everything,...

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Enhance Security by Loading All Scripts Over HTTPS

Your page is loading a script over an insecure `http://` connection. This is a security risk. An attacker could potentially intercept the script and inject malicious code, compromising your...

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Improve Security with Subresource Integrity (SRI) for CDN Scripts

You're loading a script from a third-party source (like a CDN), but you're not verifying its contents. This is a security risk. If the CDN were ever compromised, malicious code could be served to...

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Add `crossorigin` Attribute for Better Error Logging

You're loading a script from a different domain, but you're missing the `crossorigin` attribute. Without this, if the script has an error, the browser will hide the details for security reasons,...

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Improve Performance by Externalizing Large Inline Scripts

Your page has a large amount of JavaScript code written directly in the HTML. This is called an 'inline script.' It increases the size of your HTML document, which can slow down the initial page...

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Remove `console.log` Statements from Production Code

Your JavaScript code contains `console.log` statements. These are great for debugging during development, but they shouldn't be left in the code that your users see. They can clutter the browser...

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Avoid `document.write` for Better Performance and Security

Your code is using `document.write()`. This is a very old and problematic way to add content to a page. It can severely slow down your site, especially on slow networks, and can also create...

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Avoid `eval()` Due to Significant Security Risks

Your code is using the `eval()` function. This is extremely dangerous. The `eval()` function executes any string as JavaScript code, which can open your website up to major security...

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Improve Code Maintainability by Avoiding Inline Event Handlers

Your HTML contains event handlers like `onclick="..."` written directly inside the tags. This mixes your page's structure (HTML) with its behavior (JavaScript), which makes the code harder to...

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Audit Third-Party Scripts for Performance and Security

Your page is loading a script from a third-party domain. While often necessary for things like analytics, ads, or customer support widgets, every third-party script is a potential performance...

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Optimize Loading of Blocking Third-Party Scripts

A script from another website is blocking your page from loading. This is a serious performance issue. You are at the mercy of the other website's server speed, and if it's slow, your page will be...

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Update Your Code to Replace Deprecated JavaScript APIs

Your JavaScript is using an old function or feature that is 'deprecated.' This means it's no longer recommended for use and could be removed from browsers in the future. Relying on deprecated APIs...

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Link Analyzer

Shorten URLs for Better SEO and User Experience

A URL on your page is excessively long. While modern browsers can handle long URLs, they are difficult for users to read, remember, and share. Shorter, cleaner URLs are also preferred by search...

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Encode Unsafe Characters in URLs to Prevent Errors

A URL on your page contains characters (like spaces, `"`, or <`) that are not safe for use in web addresses. These characters can be misinterpreted by browsers and servers, leading to broken...

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Clean Up Internal Links by Removing Tracking Parameters

An internal link on your site contains tracking parameters (like `utm_source` or `fbclid`). These are useful for tracking marketing campaigns from external sources, but they shouldn't be used for...

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Enhance Security by Upgrading Insecure HTTP Links to HTTPS

Your page contains a link to a URL that uses `http://` instead of the secure `https://`. Loading resources over an insecure connection is a security risk and can trigger 'mixed content' warnings...

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Clean Up URLs by Removing the Default HTTP Port

A URL on your page includes `:80`, which is the default port for HTTP connections. This is unnecessary and adds clutter to the URL. While it doesn't usually break the link, removing it makes the...

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Clean Up URLs by Removing the Default HTTPS Port

A URL on your page includes `:443`, which is the default port for secure HTTPS connections. This is unnecessary and adds clutter to the URL. While it doesn't usually break the link, removing it...

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Fix Invalid URL Formats to Ensure Links Work Correctly

A link on your page has a malformed or invalid URL. This could be due to a typo or an error in how the link was generated. This will result in a broken link, which frustrates users and sends a...

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Improve SEO and Accessibility by Adding Descriptive Anchor Text

A link on your page has no text. This is a problem for both users and search engines. Screen readers for visually impaired users won't know what the link is for, and search engines won't have any...

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Replace Generic Anchor Text with Descriptive Keywords for Better SEO

You're using generic phrases like 'click here' or 'learn more' as your link text. This is a missed opportunity for SEO. The text of a link (its 'anchor text') is a strong signal to search engines...

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Improve User Experience by Replacing URL Anchor Text with Descriptive Text

A link on your page is using the URL itself as the clickable text. This can look messy and isn't very user-friendly. It's also a missed SEO opportunity. The link text should be descriptive and...

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Consolidate Anchor Text for Clearer SEO Signals

You are linking to the same page using many different phrases as the anchor text. This can dilute your SEO signals. While some variation is natural, it's best to be consistent with the primary...

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Fix Broken Internal Links (4xx Errors) to Improve User Experience

A link on your page is broken. It's pointing to a page that doesn't exist, resulting in a '404 Not Found' or similar error. This is a dead end for your users and a negative signal to search...

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Investigate Links Causing Server Errors (5xx Errors)

A link on your page is pointing to a URL that is causing a server error (a '5xx' error). This means there's a problem with the server hosting the destination page, not necessarily the link itself....

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Investigate Links That Could Not Be Checked

Our tool was unable to verify the status of a link on your page. This can happen for various reasons, such as a temporary network issue, a firewall blocking our crawler, or the other server being...

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Investigate Link Redirect Chains

Our tool had trouble following the redirect chain for a link on your page. This could indicate a problem like a redirect loop (where Page A sends you to Page B, and Page B sends you back to Page...

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Warn Users Before Linking to Large Files

You are linking to a very large file (like a high-resolution PDF or a video) without warning the user. This can be a bad experience, especially for users on mobile devices or slow connections, as...

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Verify Size of Linked Files

Our tool was unable to determine the size of a file you are linking to. This can happen if the server hosting the file doesn't provide size information correctly. It's a good idea to manually...

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Remove Empty Fragments from Links for Cleaner URLs

A link on your page ends with a hash symbol (#) but has no content after it. This creates an empty fragment, which is unnecessary and makes the URL look unprofessional. While it usually doesn't...

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Metadata Analyzer

Fill in Empty Meta Tags to Improve SEO

An important meta tag on your page (like the description) is completely empty. Meta tags provide search engines with a summary of your page's content. When they're empty, you're missing a key...

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Add Missing Content to Meta Tags for Better SEO

A meta tag on your page is missing its `content` attribute entirely. This means the tag is doing nothing. It's like having a sign with no words on it. You need to provide content for the tag to...

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Expand Short Meta Tag Content for More Impact

The content of a key meta tag (like the description) is very short. This is a missed opportunity. A good meta description should be a compelling summary that entices users to click. A few words...

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Add Missing Meta Tags to Improve SEO and Mobile Experience

Your page is missing a fundamental meta tag, such as the meta description or the viewport tag. The meta description is crucial for SEO, as it's often used as the snippet in search results. The...

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Add Open Graph Tags to Control How Your Content Appears on Social Media

When your page is shared on social media platforms like Facebook, the platform has to guess which title, description, and image to show. By adding Open Graph (OG) tags, you can tell them exactly...

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Complete Your Open Graph Data by Adding Required Properties

You've started implementing Open Graph tags, but you're missing one of the required properties (title, type, image, or URL). Without all the required tags, social media platforms may not be able...

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Add Twitter Card Markup for Richer Sharing on Twitter

When your content is shared on Twitter, it appears as a plain link. By adding Twitter Card tags, you can create a much richer experience, with a title, description, and a large image or even a...

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Complete Your Twitter Card Data by Adding Required Fields

You've started to implement Twitter Cards, but you're missing a required field for the card type you've chosen. For example, a `summary_large_image` card requires a `twitter:image` tag. Without...

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Fix Invalid JSON-LD to Enable Rich Snippets in Search Results

Your page has structured data (Schema.org) written in JSON-LD, but it contains a syntax error. This means search engines like Google can't read it. Structured data is what enables 'rich snippets'...

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Add `@type` to Your Schema.org Data to Define Its Meaning

Your structured data is missing the `@type` property. This is the most important part of Schema.org data, as it tells search engines what kind of 'thing' you are describing (e.g., an 'Article', a...

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Consider Using JSON-LD for Schema.org Implementation

This is an informational warning. Your page is using an older method called Microdata to add structured data. While this is still valid, Google and most of the SEO community now recommend using...

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Expand Your Meta Description to Improve Click-Through Rate

Your meta description is too short. This is the text that appears under your title in Google search results. A short description is a wasted opportunity to convince a user to click on your page....

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Shorten Your Meta Description to Avoid Truncation in Search Results

Your meta description is too long. Google will cut it off with an ellipsis (...) in the search results, which can look unprofessional and may hide important information or your call to action....

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Fix Your Viewport Tag by Adding the `width` Property

Your viewport meta tag, which is essential for mobile-friendliness, is missing the `width=device-width` property. This tells the browser to match the screen's width in device-independent pixels....

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Fix Your Viewport Tag by Adding the `initial-scale` Property

Your viewport meta tag is missing the `initial-scale=1.0` property. This property establishes a 1:1 relationship between CSS pixels and device-independent pixels, preventing browsers from zooming...

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Improve Accessibility by Allowing Users to Zoom

Your viewport meta tag is preventing users from zooming in on your page. This is a major accessibility issue, as it makes it difficult or impossible for users with low vision to read your content....

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Resolve Conflicting `index` and `noindex` Directives

Your robots meta tag is giving search engines contradictory instructions: it's telling them to both 'index' and 'noindex' the page. When search engines see conflicting rules, they will typically...

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Resolve Conflicting `follow` and `nofollow` Directives

Your robots meta tag is giving search engines contradictory instructions: it's telling them to both 'follow' and 'nofollow' the links on the page. When search engines see conflicting rules, they...

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Review `noindex, follow` Robots Directive

This is an informational warning. Your robots tag is set to `noindex, follow`. This tells search engines not to show this page in search results, but to still crawl the links on it and pass SEO...

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Fix Empty Canonical URL to Avoid SEO Issues

Your page has a canonical tag, but the URL is empty. A canonical tag is used to tell search engines which version of a page is the 'main' one to avoid duplicate content issues. An empty canonical...

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Review Canonical URLs with Query Strings

Your canonical URL contains a query string (e.g., `?id=123`). While this is sometimes intentional (for example, on a paginated page), it's often a mistake. A canonical URL should typically point...

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Secure Your Canonical URL by Using HTTPS

Your canonical URL is pointing to an insecure `http://` version of a page. Since HTTPS is the standard for the modern web, your canonical URL should always be the secure, HTTPS version. This...

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Fix Invalid Canonical URL Format

The canonical URL on your page is malformed or invalid. This could be a typo or an error in how it was generated. An invalid canonical URL will be ignored by search engines, which means it won't...

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Remove Fragment from Canonical URL for Better SEO

Your canonical URL contains a fragment (the part after the # symbol). Canonical URLs should point to the main version of a page without any fragments, as fragments are typically used for in-page...

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Mobile Analyzer

Set Viewport Width Correctly for Mobile Devices

Your page is telling mobile browsers to pretend they have a smaller screen than they actually do. This can cause your site to look zoomed in or not display correctly on modern smartphones. The...

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Correct Viewport `initial-scale` for Proper Mobile Display

The `initial-scale` setting in your viewport tag is not set to `1.0`. This can cause your page to load either zoomed in or zoomed out by default on mobile devices, forcing users to manually adjust...

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Improve Accessibility by Allowing Sufficient Zoom

Your viewport tag is restricting how much users can zoom in on your page. This is a major accessibility problem for users with low vision who rely on zooming to read content. Web accessibility...

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Enable Zooming for Better Mobile Accessibility

Your page is explicitly disabling the user's ability to zoom. This is a major accessibility issue, making it very difficult for users with visual impairments to read your content. This practice is...

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Add a Viewport Meta Tag to Enable Responsive Design

Your page is missing the viewport meta tag. This is the single most important tag for mobile-friendliness. Without it, mobile browsers will try to display your page as if it were on a desktop...

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Increase the Size of Touch Targets for Better Mobile Usability

A button or link on your page is too small to be easily tapped on a touchscreen. This can be very frustrating for mobile users, who might accidentally tap the wrong thing or struggle to hit the...

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Add More Space Between Touch Targets to Prevent Tapping Errors

Two or more buttons or links on your page are too close together. This makes it easy for mobile users to accidentally tap the wrong one. Providing adequate spacing between touch targets is crucial...

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Fix Empty `srcset` Attributes on Images

An image on your page has a `srcset` attribute, which is used for responsive images, but it's empty. This is invalid HTML. The browser will ignore it and fall back to the `src` attribute, but it...

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Provide Smaller Image Variants for Faster Mobile Loading

You're using responsive images, but you haven't provided a small enough version for mobile phones. This means mobile users are forced to download a larger image than they need, which wastes their...

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Optimize Image `srcset` Progression for Better Performance

The sizes of the images in your `srcset` are either too close together or too far apart. If they're too close (e.g., 400w and 420w), you're creating extra images for no real benefit. If they're...

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Add the `sizes` Attribute to Responsive Images for Faster Loading

You're using the `srcset` attribute to provide different image sizes, but you're missing the `sizes` attribute. The `sizes` attribute tells the browser how wide the image will be displayed at...

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Increase Font Size for Better Mobile Readability

The text on your page is too small to be read comfortably on a mobile device. This forces users to pinch and zoom, creating a frustrating experience. Google considers readable font sizes a key...

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Use `width` Instead of `device-width` in Media Queries

Your CSS is using `device-width` in its media queries. This is an outdated practice that can cause your responsive design to fail on some devices, especially as screen densities change. The modern...

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Implement Lazy Loading for Images to Improve Page Speed

Your page is loading all images as soon as the page starts to load, even the ones that are far down the page and not visible. This wastes data and significantly slows down the initial load time....

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Consider a Service Worker for Offline Capabilities and Performance

This is an advanced recommendation. Your site doesn't use a 'service worker.' A service worker is a script that runs in the background and can do powerful things like cache your website's assets,...

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Increase Font Size Scaling for Better Mobile Readability

Your CSS is using a font size scaling factor that results in text being too small on mobile devices. This can make your content difficult to read without zooming, which negatively impacts user...

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Increase Font Size Percentage for Mobile Devices

Your CSS is using a percentage-based font size that results in text being too small on mobile devices. Percentage-based font sizes can compound and become unreadable on smaller screens, especially...

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Use Mobile-Friendly Font Size Units

Your CSS is using font size units that can cause problems on mobile devices. Some units don't scale properly or aren't well-supported across different mobile browsers, leading to inconsistent text...

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Use Standard Breakpoints for Better Device Compatibility

Your CSS media queries are using breakpoint values that don't align with common device sizes. This can result in your responsive design not working optimally on many devices, leaving gaps where...

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Add Media Query Styles for Defined Breakpoints

You have defined breakpoints in your CSS but haven't provided corresponding styles for those screen sizes. This means your responsive design may not adapt properly at those breakpoints,...

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Optimize Render-Blocking Resources for Mobile Performance

Your page has CSS or JavaScript files that are blocking the initial render on mobile devices. This is particularly problematic on mobile because of slower network connections and less processing...

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Implement Lazy Loading for Better Mobile Performance

Your page has resources (images, videos, or iframes) that are loading immediately even when they're not visible to the user. On mobile devices with limited bandwidth and processing power, this can...

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Add Resource Hints to Improve Mobile Loading Performance

Your page is missing resource hints like `preload`, `prefetch`, or `preconnect` that can help browsers optimize loading on mobile devices. These hints allow browsers to start loading critical...

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Performance Analyzer

Eliminate Render-Blocking JavaScript to Speed Up Page Load

A JavaScript file is preventing your page from displaying until it has been fully downloaded and processed. This is a major cause of slow-loading websites, as it leaves your visitors staring at a...

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Preload Critical Scripts for Faster Interactivity

An important script is being discovered late in the page load process, which can delay when your page becomes interactive. By 'preloading' the script, you can tell the browser to start downloading...

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Preload Critical CSS for Faster Page Rendering

A key stylesheet that defines the initial look of your page is being loaded late. This can cause a delay in rendering or a 'flash of unstyled content.' By preloading this CSS, you tell the browser...

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Use Lazy Loading for Off-Screen Images to Improve Performance

Your page is loading all images immediately, even those that are far down the page and not visible to the user. This wastes data and significantly slows down the initial loading of the content...

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Add `width` and `height` Attributes to Images to Prevent Layout Shift

An image on your page is missing `width` and `height` attributes. Without these, the browser doesn't know how much space to save for the image while it's loading. When the image finally appears,...

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Use `font-display: swap` to Prevent Invisible Text While Fonts Load

Your web fonts are loading in a way that can make your text invisible until the font file has fully downloaded. This is known as the 'Flash of Invisible Text' (FOIT) and it can make your page feel...

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Use `preconnect` to Speed Up Connections to Third-Party Domains

Your page connects to other websites to load resources like fonts, scripts, or analytics. Each of these connections takes time to establish. You can speed this up by using a 'preconnect' hint,...

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Increase Browser Cache Times for Static Assets

A static resource on your page (like a CSS file or an image) is being served with a very short cache lifetime. This means that returning visitors have to re-download the file even if it hasn't...

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Enable Text Compression to Reduce File Sizes

A text-based file (like CSS, JavaScript, or HTML) is being served without compression. This means the file is larger than it needs to be, which increases download times. Enabling compression (like...

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Use the Modern WOFF2 Font Format for Better Compression

You are using an older font format like TTF, OTF, or WOFF. The modern standard is WOFF2, which offers significantly better compression and is supported by all modern browsers. Converting your...

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Serve Images in Modern Formats like WebP for Faster Loading

You are using older image formats like JPEG or PNG. Modern formats like WebP and AVIF offer much better compression, meaning they can produce smaller file sizes at the same quality. Serving...

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Implement Responsive Images for All Device Sizes

Your images are not optimized to display correctly across various screen sizes and resolutions. This can lead to poor user experience, slow loading times on mobile devices, and wasted bandwidth....

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Add Cache-Control Headers to Improve Browser Caching

A resource on your page is being served without a Cache-Control header. This means browsers don't know how long they can safely cache the resource, potentially leading to unnecessary re-downloads...

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Add Preload Hints for Important Scripts to Improve Loading Performance

An important script on your page could benefit from a preload hint. Preloading allows the browser to start downloading the script earlier in the page load process, ensuring it's available when...

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Use Async Loading for JavaScript Modules to Prevent Render Blocking

A JavaScript module on your page is loading synchronously, which can block the rendering of your page. Modern JavaScript modules should be loaded asynchronously to prevent them from delaying the...

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Add Media Attributes to Stylesheets for Conditional Loading

A stylesheet on your page is loading unconditionally, even though it might only be needed for specific media types (like print or specific screen sizes). Adding appropriate media attributes can...

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Load Print Stylesheets Asynchronously to Improve Performance

Your page has a print stylesheet that's loading synchronously, which can block the rendering of your page even though it's only needed when users print. Print stylesheets should be loaded in a way...

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Add Crossorigin Attribute to Font Preloads for Better Performance

A font resource on your page is being preloaded without the `crossorigin` attribute. Font files are always fetched with CORS (Cross-Origin Resource Sharing) enabled, so preload hints for fonts...

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Use Efficient Font Formats for Better Web Performance

Your page is using font formats that are not optimized for web delivery. Modern font formats like WOFF2 provide better compression and faster loading times compared to older formats like TTF or OTF.

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Optimize Critical Rendering Path for Faster Page Display

Your page has a long critical rendering path, meaning there are too many resources that must be loaded before the browser can display content to users. This creates delays and poor user...

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Reduce Size of Critical Resources for Faster Page Loading

A critical resource (CSS or JavaScript file) that's needed for initial page rendering is too large. Large critical resources delay the time it takes for users to see content, negatively impacting...

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Add Preload Hints for Critical Resources to Improve Loading Performance

A critical resource on your page would benefit from a preload hint. Preloading tells the browser to start downloading important resources early in the page load process, ensuring they're available...

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Implement Cache Busting for Static Resources to Ensure Updates

A static resource on your page doesn't have cache busting implemented. Without cache busting (like version numbers or hashes in filenames), browsers may serve outdated cached versions of your...

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Security Analyzer

Strengthen Your Site's Defense Against XSS with a Content Security Policy

Your page has inline scripts that could be a security risk. A strong Content Security Policy (CSP) can prevent Cross-Site Scripting (XSS) attacks by controlling which scripts are allowed to run....

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Protect Your Forms from CSRF Attacks with Anti-CSRF Tokens

A form on your page is missing protection against Cross-Site Request Forgery (CSRF). This is a type of attack where a malicious website can trick a logged-in user into unknowingly submitting a...

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Disable Autocomplete on Sensitive Form Fields to Protect User Data

A form field that collects sensitive information (like a credit card number or a one-time password) has browser autocomplete enabled. This could cause the browser to save this sensitive data,...

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Secure Your Forms by Using HTTPS for Form Submissions

A form on your page is submitting data to an insecure `http://` URL. This means the data is being sent in plain text and could be intercepted by an attacker. All form submissions, especially those...

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Use Subresource Integrity (SRI) to Secure Your CDN Assets

You are loading a script or stylesheet from a third-party CDN without verifying its contents. This is a security risk. If the CDN is ever compromised, an attacker could replace the file with...

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Eliminate Mixed Content to Keep Your Site Secure

Your secure HTTPS page is loading resources (like images, scripts, or stylesheets) over an insecure `http://` connection. This is called 'mixed content.' Modern browsers will often block these...

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Fix Content Security Policy Issues to Strengthen Site Security

Your page has a Content Security Policy (CSP) configuration issue that could leave your site vulnerable to attacks. CSP is a powerful security feature that helps prevent Cross-Site Scripting (XSS)...

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Remove Dangerous Patterns from Inline Scripts to Prevent XSS

An inline script on your page contains patterns that could be exploited by attackers to inject malicious code. These patterns, such as using `eval()`, `innerHTML` with user data, or...

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Remove Unsafe Content to Improve Site Security

Your page contains content or code patterns that pose security risks. This could include outdated libraries with known vulnerabilities, unsafe coding practices, or content that could be exploited...

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Replace Inline Event Handlers with Safer Alternatives

Your page uses inline event handlers (like `onclick="..."` in HTML). While functional, these can be a security risk as they're harder to protect with Content Security Policy and can be more easily...

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Use addEventListener for Better Security and Code Organization

Your page could benefit from using `addEventListener()` instead of inline event handlers. This modern approach provides better security by allowing stricter Content Security Policies and offers...

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Use Proper Input Type for Password Fields to Enhance Security

A field that appears to collect password information is not using `type="password"`. This means the password will be visible as the user types it, which is a security and privacy concern. Password...

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Add Input Validation to Credit Card Fields for Better Security

A field that appears to collect credit card information lacks proper input validation patterns. This can lead to invalid data being submitted and may indicate insufficient client-side validation....

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Secure External Resources by Using HTTPS

Your page is loading external resources (scripts, stylesheets, images, etc.) over insecure HTTP connections. This creates security vulnerabilities and can trigger mixed content warnings in...

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Add Crossorigin Attributes to External Resources for Better Security

External resources on your page are missing the `crossorigin` attribute. This attribute is important for security when loading resources from other domains, as it controls how the browser handles...

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Structured Data Analyzer

Fix Invalid JSON-LD to Enable Rich Search Results

Your page contains structured data in the JSON-LD format, but it has a syntax error (like a missing comma or quote). This prevents search engines like Google from reading it. Structured data is...

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Define Your Structured Data by Adding the `@type` Property

Your structured data is missing the most important piece: the `@type` property. This property tells search engines what kind of 'thing' you are describing (e.g., a 'Product', 'Recipe', 'Article')....

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Complete Your Structured Data by Adding Required Properties

Your structured data is missing a property that Google requires for the specific `@type` you've chosen. For example, a 'Product' schema needs a `name` and either `offers`, `review`, or...

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Enhance Your Structured Data with Recommended Properties

Your structured data includes all the required properties, but it's missing some that Google recommends. While not strictly necessary, adding recommended properties can provide more context to...

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Update Your Structured Data by Replacing Deprecated Properties

Your structured data is using a property that is outdated or 'deprecated.' This means it's no longer recommended for use by Schema.org or search engines. While it might not be causing an error...

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Fix JSON-LD Structure to Ensure Valid Structured Data

Your JSON-LD structured data is not properly formatted as a valid JSON object or array. JSON-LD must be either a single object (starting with `{`) or an array of objects (starting with `[`)....

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URL Analyzer

Secure Your Site by Migrating to HTTPS

Your website's URL is using `http://`, which is an insecure protocol. This means data sent between your visitors and your server is not encrypted and can be intercepted. Modern browsers show a...

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Simplify Your URL Structure for Better SEO and Usability

A URL on your site has a very deep and complex folder structure. This can make the URL long and difficult for users to understand. Search engines may also interpret a very deep URL structure as a...

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Use Lowercase URLs to Prevent Duplicate Content Issues

A URL on your site contains uppercase letters. While this might work on some servers, many servers are case-sensitive. This means `/Page` and `/page` could be treated as two different URLs,...

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Standardize Your Use of Trailing Slashes on URLs

Some of your URLs end with a trailing slash (`/`) and some don't. Search engines can treat these as two separate URLs (`/page/` and `/page`), which can lead to duplicate content issues. It's...

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Remove `index.html` from URLs for a Cleaner Look

A URL on your site includes `index.html` at the end. This is unnecessary, as web servers are configured to serve this file by default when you visit a directory. It makes the URL look cluttered...

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Shorten Long URLs for Better SEO and Shareability

A URL on your page is very long. While browsers can handle it, long URLs are difficult for users to read, copy, and share. They can also get cut off in search results. Shorter, more descriptive...

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Shorten Long URL Path Segments for Better Readability

A segment (folder or page name) in your URL path is excessively long. Long path segments make URLs difficult to read and remember, and can get truncated in search results or when shared. Shorter,...

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Encode Unsafe Characters in URLs to Prevent Errors

A URL contains characters that are not safe for web addresses, such as spaces, quotes, or special symbols. These characters can cause problems with browsers, servers, and sharing platforms. They...

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Simplify URLs by Reducing Query Parameters

A URL has an excessive number of query parameters (the part after the `?`). This makes the URL long, complex, and difficult for users to understand or share. Too many parameters can also indicate...

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Shorten Long Query Parameter Values for Better URLs

A query parameter in your URL has a very long value. This makes the URL unwieldy and difficult to share or remember. Long parameter values can also indicate that too much data is being passed...

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Clean Up Tracking Parameters in Internal URLs

Your URL contains tracking parameters (like UTM parameters or click IDs) that are typically used for analytics. While useful for tracking external campaigns, these parameters can create duplicate...

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Shorten Long URL Fragments for Better Usability

The fragment part of your URL (the part after the `#` symbol) is excessively long. While fragments are primarily used for in-page navigation, long fragments can make URLs difficult to share and...

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Encode Unsafe Characters in URL Fragments

The fragment part of your URL (after the `#`) contains characters that should be encoded for safety and compatibility. Unsafe characters in fragments can cause issues with browsers and sharing platforms.

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Shorten Long URL Paths for Better SEO

The path portion of your URL (everything between the domain and the query string) is excessively long. Long paths can indicate overly complex site structure and may be difficult for users to...

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Shorten Long Query Strings for Better URL Management

The query string portion of your URL (everything after the `?`) is excessively long. This can make URLs difficult to share, may cause issues with some systems that have URL length limits, and...

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Add First Page Link to Pagination for Better Navigation

Your pagination system doesn't include a link to the first page. This can make it difficult for users to navigate back to the beginning of a long list, especially when they're deep in the...

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Simplify Deep Category URL Structure for Better SEO

Your category URL structure is too deep with too many nested levels. This can make URLs difficult to understand and may signal to search engines that the content is buried too deep in your site...

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Web Vitals Analyzer

Reduce Total Page Size for Faster Load Times

Your webpage is very large, meaning visitors have to download a lot of data to view it. This can lead to slow load times, especially on mobile devices or slower network connections. A large page...

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Minify JavaScript Files to Reduce Page Weight

Your JavaScript files contain extra characters—like spaces, comments, and line breaks—that are helpful for developers but unnecessary for the browser. 'Minifying' your code removes this extra...

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Minify CSS Files to Speed Up Rendering

Your CSS files contain extra characters like comments and whitespace that are not needed by the browser. 'Minifying' this code removes the unnecessary data, making the files smaller and faster for...

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Optimize Image Size for Faster Page Loads

An image on your page has a very large file size. Large images are one of the most common causes of slow websites. Optimizing your images by compressing them and using modern formats can...

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Reduce DOM Size to Improve Rendering Performance

Your page has an extremely large number of HTML elements (a large DOM). A complex DOM can slow down page rendering, increase memory usage, and make JavaScript interactions feel sluggish....

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Reduce the Number of Network Requests for a Faster Page Load

Your page has to make a very high number of individual requests to the server to load all of its resources (CSS, JS, images, etc.). Each request adds overhead and can slow down the page,...

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Reduce Script File Size for Better Performance

A JavaScript file on your page is very large, which can significantly slow down your page load time and impact Core Web Vitals. Large scripts take longer to download, parse, and execute, delaying...

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Add Async or Defer Attributes to Scripts to Prevent Render Blocking

A script on your page is loading synchronously, which means it blocks the browser from continuing to render the page until the script has fully downloaded and executed. This can significantly...

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Reduce Stylesheet Size for Faster Page Rendering

A CSS file on your page is very large, which can delay when your page becomes visually complete. Large stylesheets take longer to download and process, directly impacting your Core Web Vitals scores.

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Add Media Attributes to Stylesheets for Better Performance

A stylesheet on your page is loading unconditionally, even though it might only be needed for specific media types or screen sizes. This can unnecessarily block page rendering.

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Implement Lazy Loading for Images to Improve Core Web Vitals

Images on your page are loading immediately even when they're not visible to the user. This wastes bandwidth and slows down the initial page load, negatively impacting your Largest Contentful...

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Add Responsive Images with Srcset for Better Performance

Images on your page are not responsive, meaning mobile users may be downloading unnecessarily large images. This wastes bandwidth and slows down page loading, particularly impacting mobile Core...

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Use Modern Image Formats for Better Compression and Performance

Your images are using older formats like JPEG or PNG when modern formats like WebP or AVIF could provide the same quality at much smaller file sizes. This directly impacts your Largest Contentful...

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Optimize Font File Sizes for Better Web Performance

Font files on your page are very large, which can delay text rendering and impact your First Contentful Paint (FCP) score. Large fonts can cause a flash of invisible text (FOIT) while they load.

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Add Crossorigin Attribute to Font Resources for Optimal Loading

Font resources on your page are missing the `crossorigin` attribute, which can prevent proper preloading and cause fonts to be downloaded twice, impacting performance.

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Use WOFF2 Font Format for Better Compression and Performance

Font files on your page are using older formats like TTF or WOFF instead of the more efficient WOFF2 format. WOFF2 provides superior compression, resulting in smaller file sizes and faster font loading.

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Optimize LCP Image Loading for Better Core Web Vitals

The image that serves as your page's Largest Contentful Paint (LCP) element is missing proper loading optimization. Since this is the most important visual element on your page, optimizing its...

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Add Responsive Images to LCP Element for Better Performance

The image that serves as your page's Largest Contentful Paint (LCP) element is not responsive, meaning users may be downloading unnecessarily large images. Since this is the most critical visual...

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Add Preload Attributes to LCP Video for Better Performance

A video element that serves as your page's Largest Contentful Paint (LCP) element is missing preload optimization. Since this is the most critical visual element on your page, optimizing its...

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Optimize Font Display for LCP Text Elements

Text that serves as your page's Largest Contentful Paint (LCP) element is using fonts without proper font-display optimization. This can cause invisible text during font loading, delaying when...

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Add Preload Hints for LCP Element Resources

The element that serves as your page's Largest Contentful Paint (LCP) depends on resources that aren't being preloaded. This can delay when your most important content becomes visible to users.

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Eliminate Render-Blocking Scripts for Faster Page Rendering

Scripts on your page are blocking the browser from rendering content, causing delays in when users see your page. This directly impacts First Contentful Paint (FCP) and Largest Contentful Paint...

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Replace Inline Event Handlers with Modern JavaScript

Your page uses inline event handlers (like onclick attributes) which can impact performance and security. Modern JavaScript event handling is more efficient and secure.

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Optimize Heavy Computations to Improve Interaction Performance

Your page contains JavaScript that may perform heavy computations, which can block the main thread and make your page feel unresponsive. This directly impacts Interaction to Next Paint (INP) scores.

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Add Image Dimensions to Prevent Layout Shift

Images on your page are missing explicit width and height attributes, which can cause layout shifts as images load. This negatively impacts your Cumulative Layout Shift (CLS) score.

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Reserve Space for Dynamic Content to Prevent Layout Shift

Dynamic content on your page (like ads, embedded widgets, or dynamically loaded images) doesn't have reserved space, causing layout shifts when it loads. This negatively impacts your Cumulative...

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Add Font-Display Property for Better Text Rendering

Fonts on your page are missing the font-display property, which can cause invisible text during font loading (FOIT - Flash of Invisible Text). This delays when users can read your content and...

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Implement Lazy Loading for Non-Critical Resources

Resources on your page that aren't immediately needed are loading eagerly, consuming bandwidth and potentially impacting the loading of critical resources. Implementing lazy loading can improve...

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Eliminate Render-Blocking Resources for Faster Page Rendering

Resources on your page (like CSS or JavaScript) are blocking the browser from rendering content, causing delays in when users see your page. This directly impacts First Contentful Paint (FCP) and...

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Extract and Inline Critical CSS for Faster Initial Render

Your page is loading all its CSS externally, which can delay the initial render of above-the-fold content. Inlining critical CSS (the styles needed for the immediate viewport) can significantly...

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Add Preconnect Hints for Critical Third-Party Origins

Your page is connecting to critical third-party origins (like CDNs or analytics providers) without a `preconnect` hint. This can delay the loading of resources from these origins, impacting...

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Reduce Total JavaScript Size for Faster Page Interactivity

The combined size of all JavaScript on your page is very large. This increases download times, parsing, and execution, directly impacting Time to Interactive (TTI) and Interaction to Next Paint...

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Break Up Long JavaScript Tasks to Improve Responsiveness

Your page contains JavaScript tasks that run for a long time on the main thread, making the page unresponsive to user input. This directly impacts Interaction to Next Paint (INP) scores.

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Avoid document.write() to Prevent Parser Blocking

Your page uses `document.write()`, which can block the HTML parser and significantly delay page rendering, especially for users on slow connections. This practice is generally discouraged for...

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Optimize Third-Party Script Loading for Better Performance

Your page loads third-party scripts (e.g., analytics, ads, social media widgets) that can significantly impact performance by blocking the main thread or consuming excessive network resources....

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Preload Critical Resources for Faster Page Rendering

A critical resource (like a font, image, or script) needed for the initial render of your page is being discovered and loaded late in the process. This delays when users see and interact with your...

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Improve Core Web Vitals for Better User Experience and SEO

Your page has opportunities to improve one or more Core Web Vitals metrics (LCP, FID/INP, CLS). Optimizing these metrics is crucial for providing a good user experience and can positively impact...

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Optimize Specific Resources for Improved Page Performance

A specific resource on your page (e.g., an image, script, or stylesheet) is not optimally delivered, impacting your page's loading performance. Optimizing individual resources can lead to...

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Fix Layout Shifts for a Stable Visual Experience

Your page experiences unexpected layout shifts, where elements move around after the initial render. This creates a jarring user experience and negatively impacts your Cumulative Layout Shift (CLS) score.

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