SEO Page Checker
Paste the HTML source of any page (View Source → copy) and get an instant on-page SEO audit: title, meta, headings, images, canonical and social tags.
Everything runs locally - your HTML never leaves your browser.
Paste HTML to run the audit.
How it works
The HTML is parsed entirely in your browser - nothing is uploaded. We check the title tag and meta description for presence and ideal length, count and structure your headings, flag images missing alt text, and look for canonical, robots, Open Graph and Twitter Card tags. The score is the share of checks that pass.
Basic guide
Open the source of the page you want to audit, copy the HTML and paste it into the tool.
The checker reviews important on-page SEO elements including the title, meta description, headings, images, canonical tag and social metadata.
Example
Take the HTML source from:
https://example.com/product/example
Paste the source into the checker.
The results can identify issues such as a missing title, missing meta description, heading problems, images without alt text or missing canonical information.