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HTTP Status Code Reference

Complete reference for all HTTP status codes — 1xx Informational, 2xx Success, 3xx Redirection, 4xx Client Error, 5xx Server Error. Search by number or description. Click any card to expand.

📖 Quick Reference
200OK
201Created
204No Content
301Moved Permanently
302Found (Redirect)
400Bad Request
401Unauthorized
403Forbidden
404Not Found
429Too Many Requests
500Internal Server Error
503Service Unavailable
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HTTP Status Codes Explained

HTTP status codes are three-digit numbers returned by a server in response to a client request. They are grouped by first digit: 1xx (informational), 2xx (success), 3xx (redirection), 4xx (client error), 5xx (server error). Understanding them is essential for debugging APIs, web apps, and server configurations.

Frequently Asked Questions

401 Unauthorized means no valid authentication — the user is not logged in. 403 Forbidden means the user is authenticated but lacks permission. Use 401 to prompt login; use 403 when logged in but access is denied.
301 Moved Permanently — search engines transfer link equity to the new URL. Use for permanent URL changes. 302 Found — search engines keep the old URL indexed. Use for temporary redirects.
400 Bad Request — syntax error, malformed JSON. 422 Unprocessable Entity — syntactically correct but semantically invalid (validation failed). Many REST APIs use 422 for field-level validation errors.
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What is HTTP Status Code Reference?

HTTP Status Code Reference is a free online utility designed to help developers, designers, and technical professionals work more efficiently. This tool runs entirely in your browser — no installation required, no data sent to any server.

How to Use HTTP Status Code Reference

  1. Paste or type your input in the editor area above.
  2. Click the action button to process your content.
  3. Copy the output or download the result.

Key Features

  • 100% Free — No registration or payment required.
  • Client-side Processing — Your data never leaves your browser.
  • Instant Results — Get output in milliseconds.
  • No Installation — Works directly in your web browser.
  • Mobile Friendly — Works on phones, tablets, and desktops.

Who Uses HTTP Status Code Reference?

This tool is widely used by web developers, software engineers, data analysts, students, and IT professionals who need a quick and reliable way to process data without setting up complex software environments.

Frequently Asked Questions

Is HTTP Status Code Reference free to use?
Yes, HTTP Status Code Reference is completely free. There are no hidden charges, no subscription fees, and no account required.
Is my data safe when using HTTP Status Code Reference?
Absolutely. All processing happens locally in your browser. No data is uploaded to any server, making it completely private and secure.
Can I use HTTP Status Code Reference on mobile devices?
Yes, HTTP Status Code Reference is fully responsive and works on all modern browsers and devices including smartphones and tablets.
Do I need to install anything to use HTTP Status Code Reference?
No installation is required. Simply open the page in your browser and start using it immediately.
How accurate is HTTP Status Code Reference?
HTTP Status Code Reference uses industry-standard algorithms to ensure accurate and reliable results every time.