SEO Lens — SEO audit for AI coding

About

SEO Lens audits any webpage the way a search crawler sees it, then hands you findings you can paste straight into your AI coding agent.

Open the side panel on any site and you get an instant report: overall score, per-category breakdowns, and a prioritized list of issues — each one with a copy button that produces grep-able, agent-ready plain text.

Built for the AI coding workflow
Every finding, section, and full report is one click away from your clipboard in a format Claude Code, Cursor, Copilot, or any other agent can act on. No screenshots, no hand-typing, no "fix my SEO" prompts that go nowhere.

What it audits
• Title tag — length, presence, duplication signals
• Meta description — length, presence, quality
• Headings — single H1, skip-level issues, outline
• Images — missing alt text, empty alt, decorative flags
• Structured data — JSON-LD parsing, schema.org recognition, rich-results validation, recommendations for what to add
• Social tags — Open Graph + Twitter Card completeness and preview
• Canonical + robots — self-reference, indexability, directives
• Indexing signals — noindex, nofollow, robots meta

Two tabs, one workflow
• Audit — overall score, severity counts, per-category scores, prioritized findings list with per-finding copy, share-as-image card, and full-report export as Markdown or JSON
• Metadata — raw meta, social preview, heading tree, JSON-LD blocks, breadcrumbs, indexing dashboard, site-level signals (robots, sitemaps, security.txt), and image gallery

Audits what crawlers see
SEO Lens fetches the page URL in the background and parses the response HTML — the same thing Googlebot sees on first request. No "rendered DOM" noise, no false positives from client-side injected tags.

Reactive by default
Audits re-run automatically on tab switch, window focus, full page load, and SPA soft-navigation. Works on Next.js, Nuxt, SvelteKit, Astro, Remix, Framer, Webflow, Wix, Squarespace, WordPress, Shopify, and plain HTML.

Privacy
SEO Lens runs entirely in your browser. No analytics, no tracking, no accounts. The only network request the extension makes is fetching the page you're auditing. Optional feedback form forwards your message to the developer — nothing else leaves your machine.

Free and open source
SEO Lens is free and MIT-licensed. Source and issue tracker at seo-lens.dev.