Website SEO Checker Tool

Analyze SEO, check WCAG accessibility, and inspect links, robots.txt and sitemaps on any page.

TIP: After installing, open any website (not the Web Store page) and click the S toolbar icon. Refresh already-open tabs once. Website SEO Checker Tool is a free on-page SEO audit and website analysis extension for Chrome. Analyze the SEO and accessibility of any webpage directly from your browser without leaving the page. SEO AUDIT • Check page titles and meta descriptions • Analyze H1-H6 headings • Check canonical URLs • Inspect robots meta tags • Check Open Graph and Twitter/X tags • Detect structured data and Schema.org markup • Analyze image ALT text • Check internal and external links • Inspect robots.txt and XML sitemaps TECHNICAL SEO • Check indexability signals • Detect canonical issues • Inspect links and HTTP status • View Core Web Vitals signals • Detect frameworks and technologies ACCESSIBILITY • Find missing image ALT text • Check ARIA attributes • Detect accessibility issues • Review page structure and contrast-related signals DEVELOPER TOOLS • Responsive viewport preview • CSS compression • Link security checker • Bulk URL opener • Ad blocker for testing • Entity and technology detection AI & MODERN SEO • Check structured data opportunities • Detect llms.txt • Check AI crawler access signals Privacy-focused: core analysis runs locally in your browser. No account is required for core features.