# SEO Lens

Chrome extension that audits SEO metadata on any webpage with instant scoring, structured data validation, and AI-friendly copyable reports for Claude Code and Cursor.

**Type:** tool
**Added:** 2026-05-17
**Link:** https://www.seo-lens.dev
**Topics:** Dev Tools, Open Source
**Tags:** effect-ts, performance

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I built this because every existing SEO auditor is a cloud dashboard that wants an account and a paid plan. SEO Lens runs in the browser — open any page, click the extension, get a score out of 100 with categorized findings. Every finding is copyable as structured plain text, ready to paste into Claude Code or Cursor.

The audit engine is a separate [`seo-rules`](https://github.com/Mark-Life/seo-lens) Effect-TS package — runtime-agnostic so the same rules can run in the extension, a CLI, or an MCP server later. A background service worker fetches the raw HTML (matching what crawlers see), not the JS-rendered DOM.

Free, open source, Manifest V3. [Install from the Chrome Web Store](https://chromewebstore.google.com/detail/seo-lens-%E2%80%94-seo-audit-for/aoaaiadojdhkpjjaenohoehlhldkejcb) or see the [full product breakdown](/products/seo-lens).

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## Links

- Directory entry: https://andrey-markin.com/directory/seo-lens
- All directory entries: https://andrey-markin.com/directory
- Contact: https://andrey-markin.com/#contact