SEO Auditor
On-Page SEO & Meta Tag Analyzer
Paste your HTML page source offline. Audit meta titles, headings, and images alt settings, and preview your Google search listings snippet.
Paste Page HTML
No HTML Analyzed
Paste your HTML source code on the left or load the Sandbox sample to see a comprehensive on-page SEO health score.
Perform On-Page SEO Audits Locally and Securely
An optimized on-page structure is the foundation of high organic rankings on search engines like Google and Bing. Our **On-Page SEO Checker** helps you audit your HTML code locally for crucial structural factors: optimal title lengths, descriptive meta descriptions, single H1 hierarchies, and viewport configurations for mobile search.
On-Page SEO Best Practices Checklist
- Page Title length stays between 50 to 60 characters
- Meta Description character length is between 120 to 160 chars
- Exactly one H1 tag per page representing the page title
- Every image contains a descriptive, keyword-rich alt tag
Ranked Keywords for Local Audit Tools
Target search queries include free on page seo checker, website meta tag checker offline, google search listing snippet preview, and html header tag auditor.
Frequently Asked Questions
Browsers enforce strict CORS (Cross-Origin Resource Sharing) security policies. This blocks websites from directly requesting the HTML content of other domains. Pasting the HTML source code runs instantly, avoids CORS blocks, requires no server proxy, and keeps your code 100% private.