HTTP Status Code Checker

What an HTTP status code tells you

An HTTP status code is the first thing a server sends back when a browser or bot requests a page. This HTTP status code checker lets you see that response instantly — the code itself, response time, redirect count, final URL, and headers. A 200 means the request succeeded. A 301 or 302 means the URL forwards to a different location. A 404 means the page no longer exists, and a 500 means something broke on the server side.

These codes affect how users experience your site, how search engines rank it, and whether API integrations work correctly. Search engines treat persistent 404s and 5xx errors as signals to drop pages from their index. Redirect chains — where one redirect points to another, then another — slow down page loads and dilute link equity. If you maintain a website, an API, or a webhook endpoint, the status code is where debugging starts.

Common scenarios for this tool

After a site migration, you need to verify that old URLs properly 301-redirect to their new locations. During a deployment, a quick status check confirms your endpoints return 200 instead of 502 or 503. If a third-party service you depend on starts returning errors, this tool lets you confirm the issue is on their end. Developers debugging webhook deliveries can check whether callback URLs are reachable and returning the expected response codes.

The tool also shows response time and response headers — useful for diagnosing slow responses, misconfigured caching, or missing security headers without opening browser dev tools. For deeper latency analysis, try the response time tester. To inspect all headers in detail, use the HTTP headers checker.

From one-off checks to continuous monitoring

Spot checks are useful, but downtime doesn't wait for you to run one. A URL that returns 200 right now could start throwing 503s at 3 AM when traffic spikes or a certificate expires — and if HTTPS is involved, SSL certificate monitoring catches expiry before it causes errors. For everything else, uptime monitoring tests your URLs on a schedule, tracks status codes and response times automatically, and alerts you through Slack, email, SMS, or other channels when something breaks.

HTTP status code reference

Code	Status	Meaning
200	OK	Request succeeded
301	Moved Permanently	Resource moved to a new URL
302	Found	Temporary redirect
403	Forbidden	Access denied
404	Not Found	Resource does not exist
500	Internal Server Error	Server-side error
502	Bad Gateway	Invalid response from upstream
503	Service Unavailable	Server temporarily unavailable