How to use Free SEO Site Checker
- Add response headers, cURL -i output or a HAR to Free SEO Site Checker to get started.
- Press Analyze to run it locally in your browser.
- Review the parsed redirect chain and security-header audit shown below.
About this tool
Free SEO Site Checker is a static, client-side tool with no backend. Paste the headers, curl -i output or HAR you captured and Free SEO Site Checker maps the hops and status codes locally.
Because browsers block cross-origin live requests, Free SEO Site Checker works from captured headers rather than fetching the URL itself. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does Free SEO Site Checker do?
Use Free SEO Site Checker to check your input without installing anything; everything happens client-side.
Does Free SEO Site Checker cost anything?
No — Free SEO Site Checker is completely free, with no sign-up and no hidden limits.
Does Free SEO Site Checker upload my data?
No — Free SEO Site Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
Why can't Free SEO Site Checker fetch a live URL itself?
Browsers block cross-origin requests (CORS), so Free SEO Site Checker analyzes response headers, curl -i output or a HAR you capture and paste — all locally.
Does Free SEO Site Checker work on mobile?
Yes — Free SEO Site Checker is just a web page and runs on any modern browser, including phones and tablets.