Check the HTTP response headers of any URL in seconds. See the server, content type, cache control, security headers and status code — just enter a URL and get the full picture.
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200, 301, 404 - is the server responding as expected?
HSTS, CSP, X-Frame-Options - are protections present?
Redirect chain, Cache-Control, and server type at a glance
No account required · Free · Results in under 1s
HTTP headers are lines of metadata that a web server sends with every response — and the HTTP headers checker shows them all for any URL.
When your browser requests a page, the web server responds with the content and a set of HTTP headers. These headers tell the browser how to handle the response: what type of content it is, how long to cache it, whether it can be embedded in other pages, and which security policies to apply. An HTTP headers checker displays this full list of response headers for any URL you enter.
The most important response headers are the status code, server, content type, cache control and security headers such as Content-Security-Policy, HSTS and X-Frame-Options. Every header is a signal of how well the website is configured, and the checker tool lets you review all response headers in one place.
You can use the HTTP headers checker to verify that your security headers are set correctly, tune the cache control policy of your pages, inspect the server software behind any website, or debug redirects and status codes. It is the quickest way to see the HTTP response headers of any URL — for your own sites or for any page you check.
The HTTP headers checker shows the state of your headers today. Monitoring keeps an eye on them every minute and notifies you if a security header disappears, a redirect changes or a server misbehaves. No credit card required.
Check the HTTP response headers of any URL in three simple steps.
Type the URL or domain name you want to check into the search field, for example your own site or any page on the web, and click the Check button. You can paste a full link with a path — the checker will use it as is.
The tool sends a request to the server and collects the full HTTP response: the status code and all response headers like server, content type, cache control and security headers. The results appear in a simple table.
Read each header value next to its name: check the cache control for performance, confirm security headers such as Content-Security-Policy, HSTS and X-Frame-Options, and look at the status code to see if the page responds correctly. Copy or export the results for your report.
These are the most common problems we see when people check the HTTP response headers of their site.
Your site has no Content-Security-Policy, HSTS or X-Frame-Options headers, which makes it easier to attack with XSS, clickjacking or mixed content. Run the HTTP headers checker, see which security headers are absent, and add them at the server or hosting level.
Enable Content-Security-Policy, HSTS, X-Frame-Options, X-Content-Type-Options and Referrer-Policy on your server or hosting panel, then re-check with the HTTP headers checker.
Your pages are cached too long, so visitors see outdated content, or not cached at all, so the site loads slowly. Inspect the cache control header with the checker and set the right caching policy for your content types.
Set a reasonable Cache-Control value per content type in your server config or CDN, then verify the header with the checker.
The Server response header reveals the exact software and version, which helps attackers use known vulnerabilities. Check your response headers with the tool and hide or mask the version information.
Configure your web server to send a generic Server header without version details, and confirm the change with the HTTP headers checker.
A page returns 301 or 302 redirects where it should return 200, or an error code like 404 and 500 breaks the experience. Use the HTTP headers checker to see the status code and the redirect chain, then fix the rules on the server.
Review the redirect chain with the checker, update the rules in your server or CMS config, and make sure old URLs resolve to the right final page.
Monitor all response headers around the clock and see every change in one dashboard.
Get alerted when security headers such as Content-Security-Policy or HSTS disappear or change.
Instead of running the HTTP headers checker by hand, receive an instant check whenever a header goes wrong.
See HTTP response headers from multiple locations and separate real problems from local cache.
Get notified by email or Telegram about new, missing or changed headers in real time.
Begin with a free plan and monitor the first domains without paying anything.
The HTTP headers checker shows the state of your headers today. Monitoring keeps an eye on them every minute and notifies you if a security header disappears, a redirect changes or a server misbehaves. No credit card required.
Small habits that keep your headers healthy.
Run the HTTP headers checker after each release or server change and confirm that the response headers and the status code match expectations.
Review Content-Security-Policy, HSTS, X-Frame-Options, X-Content-Type-Options and Referrer-Policy with the checker and fix anything missing.
Use the checker to see the cache control header of your pages and tune the caching policy per content type.
When you move pages, check the full redirect chain with the HTTP headers checker so that old URLs lead to the right places.
A manual check shows one moment in time. Use monitoring to see how your headers change over days and weeks.
HTTP headers are pieces of metadata that the web server sends together with the page content. They tell the browser about the content type, caching rules, security policies and the status of the response. An HTTP headers checker displays them all for a given URL.
An HTTP headers checker is a tool that sends a request to a URL and displays all HTTP response headers returned by the server, together with the status code. It is used to debug and audit websites.
Request headers are sent by the client, for example the browser, to the server, while response headers are sent back by the server. The HTTP headers checker focuses on the response headers, which show how the site is configured.
Headers affect security, performance and SEO. Checking response headers helps you find missing security headers, wrong cache settings, exposed server details and redirect problems before they harm your website.
Security headers are response headers that harden the site, such as Content-Security-Policy, HSTS, X-Frame-Options, X-Content-Type-Options and Referrer-Policy. The checker shows you which of them are present or missing.
The status code is the first line of the HTTP response: 200 means the page is OK, 301 and 302 are redirects, 404 means not found, and 500 is a server error. The HTTP headers checker shows this code for every URL you test.
Cache-Control is the response header that tells browsers and CDNs how long to store a copy of the page. A good value improves speed; a wrong or missing one causes slow loads or stale content. Check it with the headers checker.
Enter the URL in the HTTP headers checker field and press the button. The tool requests the page and returns the full list of response headers together with the status code — no setup required.
No, response headers are not displayed in the browser window, but every client receives them with the page. Tools like the HTTP headers checker can read and display them for you.
Yes. The HTTP headers checker is free and unlimited — you can check any URL at any time. Monitoring plans add alerts and continuous checks if you need them.
Check after every deployment, certificate change or server migration. For steady sites, use monitoring so there is no need to run checks by hand every day.
The HTTP headers checker shows the redirect status code, such as 301, 302 or 307, and reveals the redirect chain, so you can see whether an old URL reaches the right page or loops.