Supafast SEO Extension
On-page SEO audit in your browser: title, meta, headings, links, schema, and OG tags without third-party tools.
FreeChrome · Manifest V3
Title and meta audit
Length badges, duplicate checks, canonical and robots meta.
Heading outline
H1 audit, compact tree, and full modal for H1-H6 structure.
Visual highlights
Overlay H1-H6, follow/nofollow links, and missing alt text on the live page.
Social and schema
OG title, description, image preview, hreflang, and JSON-LD types.
Crawl shortcuts
Open robots.txt and sitemap.xml from the popup in one click.
Per-site pause
Pause overlays on a domain without uninstalling the extension.
Install
Find Supafast SEO Extension in the Chrome Web Store, or load unpacked for local testing.