Pre-publish SEO checker
Verified against current specsWhat the output means
The checker reviews selected on-page signals from the HTML you paste. Results are grouped as Passed, Warning, or Notice. It is not a complete SEO audit and cannot predict rankings.
How to use this tool
- Paste your page HTML or head content.
- Review the grouped results with explanations.
- Fix the flagged items and re-check.
- Optionally enter a canonical URL to cross-check.
How the check works
All parsing happens in your browser. We check title, meta description, H1, canonical, robots meta, Open Graph, JSON-LD, html lang, and viewport. The HTML you paste is never sent to our server.
Worked example
Pasting a page missing a canonical and viewport triggers a Warning for each, with a short fix suggestion and a link to the relevant documentation.
What this tool cannot tell you
This tool cannot crawl your site, cannot judge content quality, and does not produce an SEO score. It only checks the signals present in the pasted HTML.
Common questions
Is my HTML uploaded?
No. Parsing runs entirely in your browser; nothing is sent to our server.
Why no SEO score?
A single score would hide the reasons behind it. We show item-level results with explanations instead.
Official references
- Google Search Central: Snippets — verified 2026-11-01
- Google: Robots meta tag — verified 2026-11-01
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