Dev Tools
HTTP Status Code Lookup
The HTTP Status Code Lookup tool lets you search or browse the full range of HTTP status codes — from 200 OK to 404 Not Found to 503 Service Unavailable — and see a clear explanation of what each one means and when a server would return it. It's a quick reference for developers debugging an API response or writing error handling code.
The lookup is powered by a built-in reference list evaluated locally in your browser, so searching a code doesn't trigger any network request or send your query to a server.
How to Use the HTTP Status Code Lookup
- Open the HTTP Status Code Lookup tool.
- Type a status code or keyword into the search box.
- Browse the matching results and their descriptions.
- Click a code for a more detailed explanation.
Frequently Asked Questions
Does this cover unofficial or vendor-specific status codes too?
It covers the standard HTTP status codes defined by the relevant specifications, including common ones you'll encounter day to day across 1xx through 5xx ranges.
Can I search by keyword instead of the exact code number?
Yes, you can search using words like 'not found' or 'unauthorized' and the matching status codes will show up.
Does looking up a code make any network request?
No, the status code reference is built into the tool and searched entirely in your browser, with no server calls involved.