Look up HTTP status codes by number — view description, label, and response class (informational, success, redirect, client error, server error). Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
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The built-in reference covers common 2xx, 3xx, 4xx, and 5xx codes (no 1xx entries). Unknown numbers report as not found.
429 and 503 yes; most 4xx mean fix the request, not the timing.
Only the codes in the built-in list — novelty codes like 418 are not included.
No — lookup runs locally in your browser, free with no signup.