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HTTP Status Code Directory & Header Lookup

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Comprehensive searchable directory of all HTTP status codes (1xx-5xx) with RFC specifications, caching rules, and troubleshooting guidance.

Showing all status codes RFC 9110 / IANA HTTP Registry Standards

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How to Use the HTTP Status Code Directory & Header Lookup

Free, browser-first HTTP Status Code Directory & Header Lookup. Fast client-side computation with zero server uploads, complete privacy, and no usage limits.

Privacy & Data Processing Notice

No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.

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