# bseoa > bseoa (Black SEO Analyzer) is a technical SEO crawler and site audit tool built in Rust by Seth Black (Fiscus Technology, LLC). It runs locally on Windows, macOS and Linux with both a desktop GUI and a command-line interface, renders JavaScript/SPA pages with headless Chrome, and exports HTML, CSV, XML and JSON reports. Optional AI insights use your own Anthropic, OpenAI, Gemini or DeepSeek API key. - Free trial: 14 days, every feature, no page limit, no credit card. - Single License: $279 one-time purchase, lifetime updates. - Agency License: $1,999 one-time purchase for teams and agencies. - 16 analysis modules detecting 300+ technical SEO issue types. - Source code guarantee: buyers get the full source if the product is discontinued or goes 12+ months without updates. - Latest version: 26.9.16 (2026-09-16). ## Product - [Features](https://www.blackseoanalyzer.com/en/features.md): Every analysis module and what it checks. - [Pricing](https://www.blackseoanalyzer.com/en/pricing.md): Free trial, Single and Agency licenses; one-time purchase. - [Download](https://www.blackseoanalyzer.com/en/download.md): Installers for Windows, macOS and Linux (GUI and CLI). - [Getting Started](https://www.blackseoanalyzer.com/en/getting-started.md): Install, activate a license, run a first crawl. - [CLI Documentation](https://www.blackseoanalyzer.com/en/cli-documentation.md): Every command-line flag, output format and example. - [GUI Documentation](https://www.blackseoanalyzer.com/en/gui-documentation.md): Desktop app workflows for Windows and macOS. - [LLM Skills](https://www.blackseoanalyzer.com/en/llm-skills.md): Use bseoa from Claude and other AI agents. - [Connector](https://www.blackseoanalyzer.com/en/mcp.md): Add bseoa to Claude Desktop, Claude Code, Cursor, Codex and Perplexity; browser hosts coming. - [FAQ](https://www.blackseoanalyzer.com/en/faq.md): Licensing, trial, updates, platforms and data privacy. - [Changelog](https://www.blackseoanalyzer.com/en/changelog.md): Release notes for every version. ## Guides - [What Is a Non-Canonical URL?](https://www.blackseoanalyzer.com/en/blog/what-is-a-non-canonical-url.md): A non-canonical URL is a duplicate of a page that search engines index under another URL. When that's fine, when it hurts, and how to fix canonical problems. - [X-Robots-Tag: How to Use the HTTP Header](https://www.blackseoanalyzer.com/en/blog/x-robots-tag.md): How the X-Robots-Tag HTTP header works: supported directives, syntax, Apache and Nginx examples, noindexing PDFs and staging sites, and how to check it. - [Technical SEO Audit Checklist](https://www.blackseoanalyzer.com/en/blog/technical-seo-audit-checklist.md): A technical SEO audit checklist in the order to run it: crawlability, indexability, structure, metadata, Core Web Vitals, mobile, security and international. - [AhrefsBot and SemrushBot: What They Are and How to Control Them](https://www.blackseoanalyzer.com/en/blog/ahrefsbot-and-semrushbot.md): What AhrefsBot, SemrushBot and their site audit bots do, whether blocking them affects SEO, and robots.txt rules to slow down or block each one. - [How to Find Orphan Pages](https://www.blackseoanalyzer.com/en/blog/how-to-find-orphan-pages.md): Find orphan pages by comparing a crawl with your sitemap, Search Console, analytics, logs and CMS, then decide whether to link, redirect, noindex or remove each. - [How to See All Pages on a Website](https://www.blackseoanalyzer.com/en/blog/how-to-see-all-pages-on-a-website.md): See every page on a website using the sitemap, a site: search, Search Console, a crawler, your CMS, analytics or the Wayback Machine, and find orphan pages. - [How to Find Links to Your Website](https://www.blackseoanalyzer.com/en/blog/how-to-find-links-to-your-website.md): Find sites that link to yours with Search Console, Bing Webmaster Tools and free backlink checkers, then find every internal link to a page by crawling your site. - [Ecommerce Core Web Vitals: Fix LCP, CLS, and INP Across Your Catalog](https://www.blackseoanalyzer.com/en/blog/ecommerce-seo-fix-core-web-vitals-now.md): Ecommerce Core Web Vitals fail in predictable ways: product images, unsized tiles, variant pickers, and tag bloat. How I fix them template by template. - [How to Audit an Ecommerce Site for Crawl Waste and Index Bloat](https://www.blackseoanalyzer.com/en/blog/how-to-audit-an-ecommerce-site-for-crawl-waste-and-index-bloat.md): Count URLs three ways, find indexed pages that never earned a click, and pick one signal per pattern. The index bloat audit I run on ecommerce sites. - [A Practical Technical SEO Checklist for Agencies That Need to Ship](https://www.blackseoanalyzer.com/en/blog/a-practical-technical-seo-checklist-for-agencies-that-need-to-ship.md): The 200-bullet technical SEO checklist is why audits die in a Drive folder. A time-boxed, three-pass audit checklist you can actually ship in a week. - [Buying a Technical SEO Audit for React and Angular Apps](https://www.blackseoanalyzer.com/en/blog/buying-technical-seo-audits-for-react-angular-apps.md): Most SPA audits crawl your index.html shell and miss what Google sees. What a real React or Angular audit covers, and the questions to ask before you sign. - [Auditing Faceted Navigation: Find and Fix Your Crawl Budget Sinkhole](https://www.blackseoanalyzer.com/en/blog/auditing-faceted-navigation-find-and-fix-your-crawl-budget-sinkhole.md): Faceted navigation can bury products under millions of filter URLs. Find the waste in your logs, sort parameters, and pick canonical, robots, or noindex. ## Optional - [Full text of core pages](https://www.blackseoanalyzer.com/llms-full.txt): Features, pricing, FAQ, getting started and CLI docs as markdown. - [Technical SEO issue reference](https://www.blackseoanalyzer.com/en/technical-seo): Every issue bseoa detects, with remediation steps. - [Website crawler overview](https://www.blackseoanalyzer.com/en/website-crawler): What the crawler checks, internal link auditing, GUI and CLI. - [SEO crawler pricing compared](https://www.blackseoanalyzer.com/en/seo-crawler-pricing): Prices and crawl limits for Screaming Frog, Sitebulb, Semrush, Ahrefs and others. - [Free SEO tools](https://www.blackseoanalyzer.com/en/tools): Robots.txt tester, XML sitemap checker, schema validator, hreflang and canonical checkers, title/description length checker. - [About](https://www.blackseoanalyzer.com/en/about): Who builds bseoa. - [Source code guarantee](https://www.blackseoanalyzer.com/en/source-code-guarantee): The legal terms of the guarantee.