HTTP Status Code Lookup
Search common HTTP response codes by number, name, category or meaning.
This tool runs entirely in your browser. Your files are never uploaded to a server.
Showing 37 of 37 common entries.
| Code | Name | Description |
|---|---|---|
| 100 | ContinueInformational | The client may continue sending the request. |
| 101 | Switching ProtocolsInformational | The server is changing protocols as requested. |
| 103 | Early HintsInformational | Preload hints are sent before the final response. |
| 200 | OKSuccess | The request completed successfully. |
| 201 | CreatedSuccess | A new resource was created successfully. |
| 202 | AcceptedSuccess | The request was accepted for later processing. |
| 204 | No ContentSuccess | The request succeeded without a response body. |
| 206 | Partial ContentSuccess | The response contains the requested byte range. |
| 300 | Multiple ChoicesRedirection | Several representations or destinations are available. |
| 301 | Moved PermanentlyRedirection | The resource has a permanent new URL. |
| 302 | FoundRedirection | The resource is temporarily available elsewhere. |
| 303 | See OtherRedirection | Retrieve another resource using GET. |
| 304 | Not ModifiedRedirection | A cached representation remains valid. |
| 307 | Temporary RedirectRedirection | Repeat the request at another URL without changing its method. |
| 308 | Permanent RedirectRedirection | Permanently repeat the request at another URL with the same method. |
| 400 | Bad RequestClient Error | The server cannot process malformed request syntax. |
| 401 | UnauthorizedClient Error | Valid authentication credentials are required. |
| 403 | ForbiddenClient Error | The server understood the request but refuses it. |
| 404 | Not FoundClient Error | The requested resource could not be found. |
| 405 | Method Not AllowedClient Error | The resource does not support this HTTP method. |
| 408 | Request TimeoutClient Error | The server timed out waiting for the request. |
| 409 | ConflictClient Error | The request conflicts with the current resource state. |
| 410 | GoneClient Error | The resource is intentionally no longer available. |
| 413 | Content Too LargeClient Error | The request content exceeds the server limit. |
| 415 | Unsupported Media TypeClient Error | The request media type is not supported. |
| 418 | (Unused)Client Error | Reserved and currently unused by HTTP semantics. |
| 422 | Unprocessable ContentClient Error | The syntax is valid but instructions cannot be processed. |
| 425 | Too EarlyClient Error | The server will not risk processing a replayable request. |
| 426 | Upgrade RequiredClient Error | The client must switch to another protocol. |
| 429 | Too Many RequestsClient Error | The client exceeded a rate limit. |
| 451 | Unavailable For Legal ReasonsClient Error | Legal requirements block access to the resource. |
| 500 | Internal Server ErrorServer Error | The server encountered an unexpected condition. |
| 501 | Not ImplementedServer Error | The server does not support the requested functionality. |
| 502 | Bad GatewayServer Error | A gateway received an invalid upstream response. |
| 503 | Service UnavailableServer Error | The server is temporarily unable to handle the request. |
| 504 | Gateway TimeoutServer Error | A gateway did not receive an upstream response in time. |
| 505 | HTTP Version Not SupportedServer Error | The server does not support the request HTTP version. |
Reference covers common values and does not inspect a live response or file. Confirm uncommon or newly registered values with the governing registry.
What this tool does
Provides a fast local reference for common informational, success, redirect, client-error and server-error HTTP response codes.
How to use it
Search with a code such as 404, a phrase such as rate limit, or a class such as redirection. Matching rows update instantly.
Example
Searching 429 returns Too Many Requests and identifies it as a client error used when a client exceeds a rate limit.
Validation
The search matches code prefixes and case-insensitive words in names, categories and descriptions; it never sends a request to a target URL.
How to interpret the result
The code summarizes an HTTP response outcome. Actual behavior also depends on response headers, method, cache rules and application semantics.
Limitations
This curated table covers common standardized values, not every extension or vendor-specific code. Verify uncommon values with the IANA registry and relevant RFC.
Privacy
All processing uses local browser APIs and this tool does not upload the values you enter.
Frequently Asked Questions
- What does HTTP Status Code Lookup do?
- Provides a fast local reference for common informational, success, redirect, client-error and server-error HTTP response codes.
- How does it handle invalid input?
- The search matches code prefixes and case-insensitive words in names, categories and descriptions; it never sends a request to a target URL.
- Is entered data uploaded?
- All processing uses local browser APIs and this tool does not upload the values you enter.