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

100

Continue

The server received the request headers and the client should continue.

101

Switching Protocols

The server is switching protocols as requested by the client.

200

The request succeeded.

201

Created

The request succeeded and a new resource was created.

202

Accepted

The request was accepted for processing but is not complete.

204

No Content

The request succeeded but there is no content to return.

206

Partial Content

The server is delivering part of the resource (range request).

301

Moved Permanently

The resource has permanently moved to a new URL.

302

Found

The resource is temporarily at a different URL.

303

See Other

The response can be found at another URL using GET.

304

Not Modified

The cached version is still valid, no need to resend.

307

Temporary Redirect

Temporary redirect that keeps the original method.

308

Permanent Redirect

Permanent redirect that keeps the original method.

400

Bad Request

The server could not understand the request (bad syntax).

401

Unauthorized

Authentication is required and has failed or is missing.

402

Payment Required

Reserved for future use, sometimes used by paid APIs.

403

Forbidden

The server understood the request but refuses to authorize it.

404

Not Found

The requested resource could not be found on the server.

405

Method Not Allowed

The HTTP method is not allowed for this resource.

408

Request Timeout

The server timed out waiting for the request.

409

Conflict

The request conflicts with the current state of the resource.

410

Gone

The resource is permanently gone and will not return.

418

I'm a teapot

An April Fools joke from RFC 2324, the server refuses to brew coffee.

422

Unprocessable Entity

The request was well formed but had semantic errors.

429

Too Many Requests

The user has sent too many requests in a given time (rate limited).

500

Internal Server Error

A generic server error, something went wrong on the server.

501

Not Implemented

The server does not support the functionality required.

502

Bad Gateway

The server got an invalid response from an upstream server.

503

Service Unavailable

The server is not ready, often overloaded or down for maintenance.

504

Gateway Timeout

An upstream server did not respond in time.

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