HTTP Status Code Lookup
Look up any HTTP status code by number or keyword.
How to use
Runs entirely in your browser. Live updates or click to run. No signup, no tracking, no data sent anywhere.
Part of 71 free tools by Auburn AI. Category: Dev Tools
About this tool
HTTP Status Code Lookup is a reference tool for developers, QA testers, and anyone debugging web requests. Paste or type in any three-digit HTTP status code and get a plain-language explanation of what it means, which category it falls into, and what typically causes it. No hunting through RFC documents or MDN tabs.
Reach for this tool when an API returns an unexpected response, when a server log is full of codes you don’t recognise, or when you’re writing error-handling logic and want to confirm exactly what a code signals. It covers the full range from 1xx informational through 5xx server errors.
How to use it
- Type the three-digit HTTP status code into the lookup field.
- Press Enter or click the Lookup button to fetch the result.
- Read the plain-language definition and the official status name.
- Check the category label to confirm whether it is a client or server error.
- Review common causes listed to help narrow down your debugging.
- Copy the explanation if you need to share it with your team.
Pro tips
- Codes in the 4xx range point to client-side problems; always rule out your request headers and auth tokens first.
- A 301 and 308 both redirect permanently but differ in whether the HTTP method is preserved on the new request.