HTTP Status Codes Reference
Browse and search all HTTP status codes. Click any code to see details.
Informational (1xx)
Success (2xx)
Redirection (3xx)
Client Error (4xx)
Server Error (5xx)
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How It Works
Browse the complete HTTP status code reference organized by category (1xx-5xx). Each code shows its name, description, and common scenarios where you would encounter it. Search by code number or keyword to find what you need instantly.
When to Use It
- API debugging — quickly look up what a 403, 422, or 502 status code means when troubleshooting API calls.
- Web development — understand the correct status code to return from your server for different scenarios.
- SEO analysis — check whether redirects use 301 (permanent) or 302 (temporary) to understand their impact on search rankings.
Frequently Asked Questions
What is the most common error code?
404 Not Found is the most common client error. 500 Internal Server Error is the most common server error. Both indicate different types of problems.
What is the difference between 301 and 302?
301 is a permanent redirect — search engines transfer the old URL ranking to the new one. 302 is temporary — the old URL keeps its ranking.
What does 418 mean?
418 I'm a Teapot is an April Fools joke from RFC 2324. It is not used in production but has become a beloved part of internet culture.
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