404
4xx · Client error
The requested resource is missing
Not Found
The server cannot find the requested resource. The URL may be wrong, moved or deleted.
When you will see itA broken link, mistyped URL or API route that does not exist.
HTTP Status Code Lookup Online
Enter a code like 404 or search a phrase like rate limit to get the official status name and a practical, plain-English explanation.
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Browse HTTP response codes
Select a code to open its full explanation above.
No matchThat status code is not in this reference.
Try a code or a phrase such as “redirect,” “authentication” or “gateway.”
How to use this HTTP status code lookup
This online lookup is built for quick debugging. Search the numeric response from your browser, API client, server log or monitoring alert, then use the practical explanation to decide where to investigate next.
Search the response
Enter a three-digit code, official name or symptom such as “temporary redirect” or “rate limit.”
Read the context
See whether the response is informational, successful, a redirect, a client problem or a server problem.
Copy or share it
Copy the standard status line or create a direct link for a teammate, ticket or debugging note.
HTTP status code classes at a glance
The first digit tells you the broad outcome. Use it as the fastest starting point before reading the individual status.
Informational responses
The request was received and the connection is continuing.
Successful responses
The server received, understood and accepted the request.
Redirection messages
The client must take another step, often by following another URL or using a cached response.
Client error responses
The server cannot fulfill the request because of its syntax, credentials, permissions, rate or requested resource.
Server error responses
The server failed while processing a request that may otherwise be valid.
HTTP status code lookup FAQ
What is an HTTP status code?
An HTTP status code is a three-digit response sent by a server after a browser, application or API client makes a request. It summarizes the outcome so the client knows what to do next.
What is the difference between 4xx and 5xx codes?
A 4xx status usually points to the request: it may be malformed, unauthenticated, forbidden or aimed at a missing resource. A 5xx status means the server or an upstream service failed while handling it.
Which HTTP response codes are most common?
Common responses include 200 OK, 201 Created, 301 Moved Permanently, 304 Not Modified, 400 Bad Request, 401 Unauthorized, 403 Forbidden, 404 Not Found, 429 Too Many Requests, 500 Internal Server Error and 503 Service Unavailable.
Does this online tool send my searches anywhere?
No. Filtering and lookup happen directly in your browser. The page does not need to send the code or phrase you type to a server.
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