How do I look up a single status code?

Type the three-digit number, such as 301 or 503, into the box. The tool instantly shows the official reason phrase and a short plain-language explanation of what the code means.

Can I search by keyword instead of a number?

Yes. Type a word like 'timeout', 'redirect', or 'forbidden' and the tool lists every matching status code so you can find the right one without remembering the exact number.

What is the difference between 4xx and 5xx codes?

Codes in the 4xx range mean the request had a problem on the client side, like a bad URL or missing permission. Codes in the 5xx range mean the server failed to handle a request that may have been valid.

HTTP Status Code Lookup

Input

Output

What the HTTP Status Code Lookup does

This tool turns a cryptic HTTP status code into a clear answer. Type a three-digit number, like 404 or 500, and it instantly returns the official reason phrase along with a short explanation of what the code means and when a server sends it. You can also type a keyword, such as timeout or redirect, and it lists every status code whose name or description matches, which is handy when you remember the idea but not the number. It helps web developers, API builders, QA testers and support staff who run into status codes in logs, browser tools and API responses and need a fast, reliable reference.

Codes are grouped into families: 1xx informational, 2xx success, 3xx redirects, 4xx client errors and 5xx server errors. Knowing the family alone often tells you where to start looking.

How to use the lookup

Type a three-digit status code (for example 404) into the Input box, or type a keyword like forbidden.
The result appears in the Output box right away, showing the reason phrase and its meaning. No button to press.
For a keyword, scan the list of matching codes and pick the one that fits your situation.

A quick example

Type 404 and you get Not Found, meaning the server could not find the requested resource. Type timeout and you get matches like 408 Request Timeout and 504 Gateway Timeout, so you can compare them side by side.

It all runs in your browser. Nothing is uploaded, so it is private by default, instant, free and needs no sign-up.

Frequently asked questions

How do I look up a single status code?: Type the three-digit number, such as 301 or 503, into the box. The tool instantly shows the official reason phrase and a short plain-language explanation of what the code means.
Can I search by keyword instead of a number?: Yes. Type a word like 'timeout', 'redirect', or 'forbidden' and the tool lists every matching status code so you can find the right one without remembering the exact number.
What is the difference between 4xx and 5xx codes?: Codes in the 4xx range mean the request had a problem on the client side, like a bad URL or missing permission. Codes in the 5xx range mean the server failed to handle a request that may have been valid.

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Last updated: June 17, 2026