HTTP Status Codes
Look up common HTTP status codes and filter by number or name. A local reference, not a live request inspector.
Runs in your browser. Nothing is uploaded.
- 100
Continue
Request headers received; continue with the body.
- 101
Switching Protocols
Server is switching protocols as requested.
- 200
OK
Request succeeded.
- 201
Created
A new resource was created.
- 202
Accepted
Request accepted for processing.
- 204
No Content
Success with an empty body.
- 301
Moved Permanently
Resource has a new permanent URI.
- 302
Found
Temporary redirect.
- 304
Not Modified
Cached representation is still valid.
- 307
Temporary Redirect
Retry the same method at a new URI.
- 308
Permanent Redirect
Retry the same method at a permanent URI.
- 400
Bad Request
Malformed request.
- 401
Unauthorized
Authentication is required.
- 403
Forbidden
Authenticated but not allowed.
- 404
Not Found
No resource at this URI.
- 405
Method Not Allowed
HTTP method is not supported here.
- 409
Conflict
Request conflicts with current state.
- 415
Unsupported Media Type
Payload format is not supported.
- 422
Unprocessable Entity
Well-formed but semantically invalid.
- 429
Too Many Requests
Rate limit exceeded.
- 500
Internal Server Error
Unexpected server failure.
- 502
Bad Gateway
Upstream server returned an invalid response.
- 503
Service Unavailable
Server is temporarily overloaded or down.
- 504
Gateway Timeout
Upstream server did not respond in time.
About this tool
Filter common HTTP status codes by number or phrase. 2xx, 3xx, 4xx, and 5xx staples are included.
How to use: type 404 or timeout, scan the list. This is a reference, not a live probe.
Example: 429 is Too Many Requests. Related: security headers for response header audits.
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