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.

Paste page HTML

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.

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SERP Snippet PreviewPreview your title & meta description as a Google result with length meters.Schema Markup GeneratorBuild valid JSON-LD structured data for articles, products, FAQs and more.Keyword Density AnalyserPaste copy and see word and phrase frequency, counts and percentages.