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HTTP Status Code Reference - Online Search & Meanings

Developer Tools Reference cheat sheet HTTP reference status codes
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HTTP Status Code Reference

Quickly search, filter and understand every HTTP response status code.

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Frequently Asked Questions

HTTP status codes are standard response codes given by web servers on the internet. They help identify the outcome of an HTTP request – whether it succeeded, failed, or requires further action.

The 404 Not Found status code indicates that the server could not find the requested resource. This is usually due to a broken link or a mistyped URL.

A 301 status code means a permanent redirect, telling search engines to update their indexes, while a 302 means a temporary redirect, leaving the original URL indexed. Use 301 for permanent moves and 302 for temporary ones.

5xx errors (500-511) indicate a problem on the server side. Common ones include 500 Internal Server Error, 502 Bad Gateway, and 503 Service Unavailable.

200 OK is the standard response for a successful HTTP request. The actual meaning depends on the request method (GET, POST, etc.). It's the most common success code.

Yes, some codes like 418 (I'm a teapot) are non-standard or used humorously. Several clouds and APIs also use unofficial codes above 511 for custom purposes.
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