HTTP Status Code Lookup – Complete 1xx–5xx Reference
Swiftly investigate exhaustive HTTP status algorithms navigating 1xx to 5xx tiers natively. Access meticulous developer contexts and standard resolutions.
1xx Informational
2xx Success
3xx Redirects
4xx Client Errors
The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible.
5xx Server Errors
How to Use the HTTP Status Code Lookup
Search or Filter
Type a status code (e.g. 404) or keyword (e.g. 'redirect', 'rate limit') in the search box, or filter by category.
Click to Expand
Click any status code card to reveal the full description and context of when it is used.
Copy
Use the copy button on each card to copy the code or name directly to your clipboard.
Frequently Asked Questions
What is the difference between 401 and 403?
401 Unauthorized means authentication is required (login). 403 Forbidden means the server knows who you are, but won't let you in (permission issue).
When should I use 301 vs 302 redirect?
Use 301 (Moved Permanently) when a page has permanently moved — browsers and search engines update their records. Use 302 (Found) for temporary redirects that may change.
What causes a 502 Bad Gateway?
A 502 means a proxy/load balancer received an invalid response from an upstream server. Common when a backend app crashes or is unresponsive.
What does 429 Too Many Requests mean for APIs?
It means you've hit the rate limit of an API. Check the Retry-After header to know when to try again.
Is this list complete?
We cover all major RFC-standard codes. Some codes are WebDAV-specific or rarely used in practice, but labeled accordingly.
Embed / Link
https://tools.devriq.in/http-status-lookup/