OnPage SEO Checker — Meta Tags, Headings, Keyword & Readability Audit

Stop juggling five SEO extensions just to check one page.

OnPage SEO Checker scans title tags, meta descriptions, headings, images, links, Open Graph tags and schema markup — then gives you a single 0–100 score and a plain-English list of what to fix first, in one panel.

WHAT YOU GET

✓ On-page audit — title, meta description, canonical, robots, viewport, language, each with pass/warn/fail status

✓ Heading outline — full H1–H6 structure with duplicate or missing-H1 warnings

✓ Focus keyword checker — see instantly if your keyword is in the title, meta description, H1, URL and first 100 words, plus live keyword density

✓ Readability score — word count, reading time and Flesch readability

✓ Image audit — every image missing alt text, listed

✓ Link audit — internal vs. external counts, nofollow count, and an on-demand broken-link (HTTP status) scanner

✓ Social preview — see your Open Graph / Twitter Card exactly as it will look when shared

✓ Schema detector — every JSON-LD structured data type found on the page

✓ One-click "Copy report" — paste a clean summary into a client email or Slack

WHY IT'S DIFFERENT

No account. No trial. No "upgrade to unlock." Every check runs 100% inside your browser — nothing is uploaded, logged, or sent to a server. That also means it keeps working even when other extensions' backend APIs go down.

Built for content writers, indie site owners, and SEO teams who want one clean answer instead of five conflicting dashboards.