SEO ToolBox

SEO ToolBox puts a complete on-page SEO audit in Chrome's side panel. It stays open while you browse and updates as you move from page to page. No account, no paywall, and your data stays in your browser. PAGE HEALTH AT A GLANCE • One score out of 100, with the top issues to fix ranked by impact • A full audit that shows every check, how much it counts, and how to fix it TECHNICAL SEO • HTTP status codes and redirect chains, including redirects on the way to the page • Indexability from meta robots, the X-Robots-Tag header and robots.txt • Canonical tag checks • A robots.txt tester that shows the exact rule blocking Googlebot • XML sitemap check • hreflang and mobile viewport checks CONTENT & META • Title and meta description checks with a search result preview • Heading outline with skipped-level warnings; click a heading to find it on the page • Keyword density for one- to three-word phrases • Social sharing tags LINKS & IMAGES • Broken link checker with live status codes for every link on the page • Nofollow and sponsored links highlighted on the page • Missing alt text, oversized images and modern-format suggestions, with one-click WebP conversion SCHEMA MARKUP VALIDATOR • Reads JSON-LD and microdata structured data • Validates it against Google's rich result requirements and explains what's missing AI SEARCH VISIBILITY • Shows whether AI search and AI training crawlers are allowed to read the page • Checks for an llms.txt file and how much content loads without JavaScript CORE WEB VITALS • Real-user loading, interactivity and layout-shift data for mobile or desktop • A 25-week trend SEARCH CONSOLE (OPTIONAL) • Sign in with Google to see clicks, impressions, position and top queries for the page you're on, plus its index status. Read-only. CHANGE TRACKING • See what changed on a page since your last visit • A warning when a page suddenly becomes noindex or stops returning 200 • Track every site or only the sites you manage. History stays in your browser. ALSO INCLUDED • Google algorithm update tracker • Page overlays, CSV export and copy-to-spreadsheet • Light and dark mode, and a tab layout you can reorder • Optional rankings and backlink data with your own DataForSEO account PRIVACY All page analysis happens in your browser. SEO ToolBox has no account and doesn't sell your data. Checks request a site's public files directly from that site. Usage statistics are anonymous and only shared if you opt in. Made by RedSEO: