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HTTP Status Code Lookup

Find out what any HTTP status code means and which response category it falls into.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This tool looks up any HTTP status code and returns its standard reason phrase (like "Not Found" for 404 or "Moved Permanently" for 301) along with its category — 1xx informational, 2xx success, 3xx redirection, 4xx client error, or 5xx server error — as defined in the HTTP specification (RFC 9110).

Web developers use it while debugging API responses and server logs, SEO professionals use it to understand redirect chains and crawl errors, and students learning web development use it as a quick reference instead of digging through the RFC.

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