How to use Website URL Checker
- Give Website URL Checker response headers, cURL -i output or a HAR to work from.
- Hit Analyze and Website URL Checker computes the result client-side.
- Use the parsed redirect chain and security-header audit Website URL Checker produces — nothing was uploaded.
About this page
There is no server behind Website URL Checker. Paste the headers, curl -i output or HAR you captured and Website URL Checker maps the hops and status codes locally.
Because browsers block cross-origin live requests, Website URL Checker works from captured headers rather than fetching the URL itself. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What is Website URL Checker for?
Website URL Checker runs entirely on your device: add your input, and it checks it locally in real time.
Is Website URL Checker free to use?
Yes — Website URL Checker is completely free, with no usage limits.
Does Website URL Checker upload my data?
No — Website URL Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
Why can't Website URL Checker fetch a live URL itself?
Browsers block cross-origin requests (CORS), so Website URL Checker analyzes response headers, curl -i output or a HAR you capture and paste — all locally.
Does Website URL Checker work offline?
Once the page has loaded, Website URL Checker keeps working with no network connection.