---
title: "Add Cache-Control Headers to Improve Browser Caching | bseoa"
description: "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…"
image: "https://www.blackseoanalyzer.com/static/images/black-seo-analyzer-og-image.png"
canonical: "https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/missing-cache-control-header"
language: "en"
---

# Add Cache-Control Headers to Improve Browser Caching

Performance Analyzer

## What is this warning?

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 on subsequent visits. Proper cache headers are essential for optimal performance and reduced server load.

## How to Fix This Issue

### How to Fix It

#### The Problem

A static resource is being served without any caching directives, causing browsers to re-request it unnecessarily.

#### The Solution

Configure your web server to send appropriate Cache-Control headers. For static assets that rarely change, use a long cache duration:

```
Cache-Control: public, max-age=31536000, immutable
```

For dynamic content, use shorter cache times:

```
Cache-Control: public, max-age=3600
```

#### Why This Works

Proper cache headers allow browsers to store resources locally and serve them from cache on subsequent visits, dramatically reducing load times and server requests. This is fundamental for good web performance.

### SEO Impact

This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.

### Automatic Detection

bseoa automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.

## Other Performance Analyzer issues

- [Add width and height Attributes to Images to Prevent Layout Shift](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/image-dimensions)
- [Add Crossorigin Attribute to Font Preloads for Better Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/font-crossorigin)
- [Add Media Attributes to Stylesheets for Conditional Loading](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/stylesheet-media-attribute)
- [Add Preload Hints for Critical Resources to Improve Loading Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/missing-preload-hint)
- [Add Preload Hints for Important Scripts to Improve Loading Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/script-preload-hint)
- [Eliminate Render-Blocking JavaScript to Speed Up Page Load](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/render-blocking-script)
- [Enable Text Compression to Reduce File Sizes](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/resource-not-compressed)
- [font-display: swap Explained: Stop Invisible Text While Fonts Load](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/font-font-display)
- [Implement Cache Busting for Static Resources to Ensure Updates](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/missing-cache-busting)
- [Implement Responsive Images for All Device Sizes](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/responsive-image)
- [Increase Browser Cache Times for Static Assets](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/insufficient-cache-time)
- [Load Print Stylesheets Asynchronously to Improve Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/print-stylesheet-loading)
- [Optimize Critical Rendering Path for Faster Page Display](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/long-critical-path)
- [Preload Critical CSS for Faster Page Rendering](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/critical-css-preload)
- [Preload Critical Scripts for Faster Interactivity](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/critical-script-preload)
- [Reduce Size of Critical Resources for Faster Page Loading](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/large-critical-resource)
- [Serve Images in Modern Formats like WebP for Faster Loading](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/image-not-optimized)
- [Use preconnect to Speed Up Connections to Third-Party Domains](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/missing-preconnect-hint)
- [Use Async Loading for JavaScript Modules to Prevent Render Blocking](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/module-needs-async)
- [Use Efficient Font Formats for Better Web Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/font-format)
- [Use Lazy Loading for Off-Screen Images to Improve Performance](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/lazy-load-image)
- [Use the Modern WOFF2 Font Format for Better Compression](https://www.blackseoanalyzer.com/en/technical-seo/performance-analyzer/font-not-woff2)

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