HTTP Status Code Lookup

Type a code or a word ('redirect', 'auth', 'rate') — get the meaning and the usual fix, from 100 Continue to 511 Network Authentication Required.

Quick answer: Search or browse every HTTP status code (1xx–5xx) with a plain-English meaning and the fix to try. Instant reference for devs and site owners — free, offline-capable, in your browser.

How to use

Type 404, 'cors' or 'rate' in the box.

About this tool

HTTP statuses group into five families: 1xx informational, 2xx success, 3xx redirect, 4xx client error, 5xx server error. Each entry here pairs the official meaning with the practical next step (e.g. 429 = slow down / retry-after; 502 = upstream died, retry; 301 vs 308 for permanent moves with method preserved) — the context stack traces never give you.

FAQ

301 vs 308?

Both permanent; 308 keeps the request method (POST stays POST) — use 308 for form endpoints.

401 vs 403?

401 = not authenticated (login may fix it); 403 = authenticated but not allowed.

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The complete http status code lookup guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Http Status Code Lookup — Complete Guide, Mistakes & FAQ covers all of it step by step.

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HTTP Status Code Lookup

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The complete http status code lookup guide