HTTP Status Code Lookup
HTTP reference
HTTP Status Code Lookup
Look up common HTTP status codes and what they usually mean.
Usage guide
Interpret HTTP response codes in the context of the request
HTTP status codes summarize how a server handled a request, but the same code can have different practical causes depending on redirects, caching, authentication, proxies, and application logic. Use the lookup as a quick reference, then inspect the response headers and body.
How to use HTTP Status Code Lookup
- 1.Enter the numeric status code returned by the browser, API client, server log, or monitoring system.
- 2.Read the general meaning and status family, then check the request method and response headers.
- 3.Use application logs or network traces to identify the specific cause rather than treating the code description as the complete diagnosis.
Examples
- 301 and 308 both indicate permanent redirects but differ in how method preservation is defined.
- 404 means the requested resource was not found at that URL, not necessarily that the entire service is unavailable.
- 429 usually indicates rate limiting and should be handled according to server guidance such as Retry-After.
Limitations and notes
- Custom applications and proxies can return standard codes for non-standard internal reasons.
- Security systems may intentionally return generic codes that reveal less detail to the requester.
Is every 5xx error a server bug?
A 5xx response means the server side could not successfully fulfill the request, but the cause can include upstream services, gateways, overload, configuration, or application faults.
What is the difference between 401 and 403?
401 generally means authentication is required or invalid, while 403 generally means the server understood the identity or request but refuses access.
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How the http status code lookup works
Paste or enter the code, data, or value you want to inspect.
The tool processes it locally in your browser.
Copy the formatted output or converted value for your project.
Frequently Asked Questions
Is the http status code lookup free?
Yes. It is free and does not require an account.
Is my code sent to a server?
No. These developer tools run locally in your browser.
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