Fetch the HTTP response headers of any URL — status code, content type, caching, security headers and more.
HTTP response headers are the metadata a server sends back before the page content: the status code, the content type, caching instructions, security policies and more. They are invisible to the visitor but critical for developers, SEO auditors and security reviewers.
This tool runs get_headers from the server side, which means it sees the response as any server would — including headers that CORS would hide from a browser-side fetch. It does not follow more than one redirect, so you see the headers of the URL you typed, not the final destination.
The request runs with a 5-second timeout and rate limiting. The URL you check is not stored.
Because the dev tools show headers as your browser receives them, after CORS filtering. This tool shows them as a server sees them, which includes headers the browser hides.
It follows one redirect at most. If the URL redirects, you see the headers of the redirect response, not the final page.
Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options and Referrer-Policy are the most important.
Yes. A few requests per minute is fine for normal use.
Vai.la turns any URL into a short link with click statistics, QR Code and your own biolink.
Vai.la is not responsible for how the tools are used or for decisions made based on their results.