HTTP Status Codes
A complete reference guide to every HTTP response code. Search by number or browse by category. Built for developers, by developers.
📂 Browse by Category
1xx
Informational
4 codes
2xx
Success
10 codes
3xx
Redirection
9 codes
4xx
Client Errors
30 codes
5xx
Server Errors
11 codes
Unofficial
Nginx, Cloudflare, etc.
20 codes
⭐ Most Looked-Up Codes
404
Not FoundThe server cannot find the requested resource.
500
Internal Server ErrorA generic error message for an unexpected server problem.
502
Bad GatewayOne server received an invalid response from another server.
503
Service UnavailableThe server is not ready to handle the request.
301
Moved PermanentlyThe resource has been permanently moved to a new URL.
403
ForbiddenThe server understood the request but refuses to authorize it.