What are HTTP status codes?

Three-digit numbers a server returns with every HTTP response to say what happened: 2xx means success, 3xx means redirection, 4xx means the client made an error, and 5xx means the server failed.

How do I look up a code?

Type the number (for example 418) or a keyword (for example redirect) into the search box, or filter by the 1xx through 5xx classes.

What is the difference between 401 and 403?

401 Unauthorized means authentication is missing or invalid, so try logging in. 403 Forbidden means the server understood your credentials but still refuses; you do not have permission.

What is the difference between 301 and 302?

301 Moved Permanently tells clients and search engines the URL has moved for good and to update bookmarks and indexes. 302 Found is a temporary redirect.

429 Too Many Requests means you hit the server's rate limit. Slow down, respect the Retry-After header if present, and retry later.

What is status code 418?

418 I'm a teapot is an April Fools' joke from RFC 2324 (Hyper Text Coffee Pot Control Protocol) that stuck around as a real, if rarely used, code.

HTTP Status Codes - Free Online HTTP Status Code Reference | IconVault

Look up any HTTP status code: 200, 301, 404, 500 and more, with plain-English meanings and when each appears. Free reference in your browser.

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HTTP Status Codes

Look up any HTTP status code and learn what it means

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Click any code to copy its number. 62 codes listed.

About this tool

IconVault's HTTP Status Codes is a searchable reference of every HTTP status code, from 100 Continue to 511 Network Authentication Required. Search by code or keyword, filter by class (1xx informational, 2xx success, 3xx redirection, 4xx client error, 5xx server error), and get a plain-English explanation of what each code means and when servers send it.

It runs fully in your browser with no signup and is free to use, handy whether you are debugging a failing API call, writing error handling, or studying for an exam. Honest note: it is a reference guide, not a live checker; the exact behavior of a code can vary slightly between servers and frameworks.

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HTTP Status Codes - Free Online HTTP Status Code Reference | IconVault

HTTP Status Codes

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