How to use Website SEO Checker
- Paste or load response headers, cURL -i output or a HAR into Website SEO Checker.
- Press Analyze to run it locally in your browser.
- Read the parsed redirect chain and security-header audit that Website SEO Checker lays out for you.
About this tool
Everything Website SEO Checker does happens on your own device. Website SEO Checker reconstructs a redirect chain and status codes from response headers, a curl -i dump or a HAR you capture in DevTools.
It also audits the final response for security headers such as HSTS, CSP and X-Content-Type-Options. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What is Website SEO Checker for?
Website SEO Checker lets you check your input right in the browser, with the result shown instantly and nothing uploaded.
Does Website SEO Checker cost anything?
No — Website SEO Checker is completely free, with no sign-up and no hidden limits.
Where is my data processed by Website SEO Checker?
Entirely in your browser — Website SEO Checker keeps your data on your own machine and sends nothing anywhere.
Why can't Website SEO Checker fetch a live URL itself?
Browsers block cross-origin requests (CORS), so Website SEO Checker analyzes response headers, curl -i output or a HAR you capture and paste — all locally.
Can I use Website SEO Checker without a connection?
Yes — after the first load Website SEO Checker runs entirely offline.