Open source · 70 checks · No paid APIs

Find what's holding your site back

Paste a URL. OpenSEO grades on-page SEO, speed, links, mobile, security and AI search readiness, then tells you what to fix first.

Core Web Vitals offTurn on in SettingsTakes about 15 seconds

Seven areas, one grade

Each area gets its own score, weighted by how much it matters for search.

  • On-page SEO

    What search engines read: titles, headings, content and markup.

    30%

  • Performance

    How quickly the page arrives and how heavy it is.

    20%

  • Usability

    How the page works on phones and for everyone using it.

    12%

  • Security

    HTTPS, certificates, headers and email authentication.

    12%

  • Links

    Broken links, link text and how the page links out.

    10%

  • Social

    How the page looks when shared, and its social profiles.

    8%

  • AI search

    Whether AI assistants and answer engines can read and cite the page.

    8%

Recent audits

See all