HTTP Status and Header Reference
Look up common HTTP status codes and header meanings with examples across request, response, caching, CORS and security categories, then copy with one click.
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Features
- Common 1xx through 5xx codes
- Request and response headers
- Caching headers
- CORS and security headers
- Category search and one-click copy
FAQ
What is the difference between 401 and 403?
401 means authentication is missing or invalid; 403 means the server knows the identity but refuses access.
Does no-cache disable caching?
No. no-cache permits storage but requires revalidation before reuse. Use no-store to prevent storage entirely.
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