HTTP Status Codes
Look up HTTP status numbers, categories and explanations in an embedded reference. Use it while reading a server response; the page does not request a website to discover its actual status.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Search for a number or a descriptive keyword. Interpret the result alongside the request method and response headers because a status code alone does not explain every protocol detail.
Results and examples
404 helps identify a missing-resource response, while 301 indicates a permanent move. Finding 200 in the reference does not mean that any particular page has returned a successful response.
Limitations
- The embedded catalogue is not a live synchronization of every HTTP extension.
- Caching, authentication and redirect behaviour require more than a code number.
Fields
| Field | Guidance and constraints |
|---|---|
| Search (code / text) | Check the unit and format displayed beside this field. |
| Status code table | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
Does searching a code check my website?
404 helps identify a missing-resource response, while 301 indicates a permanent move. Finding 200 in the reference does not mean that any particular page has returned a successful response.
Is the code enough to decide a response?
The embedded catalogue is not a live synchronization of every HTTP extension. Caching, authentication and redirect behaviour require more than a code number.
