HTTP Status Codes Reference

What is a HTTP Status Codes Reference?

Browse and search the complete reference list of HTTP response status codes—including 1xx Informational, 2xx Success (200 OK, 201 Created), 3xx Redirection (301, 302), 4xx Client Errors (400, 401, 403, 404), and 5xx Server Errors (500, 502, 503).

Why Use This Tool?

API Development: Choose the correct HTTP status code for REST API responses.
SEO & Webmaster Debugging: Understand 301 Permanent Redirects vs 302 Temporary Redirects and 404 Not Found errors.
Troubleshooting: Quickly diagnose 502 Bad Gateway and 504 Gateway Timeout server errors.

How to Use

Search by code number (e.g. `404`) or category (e.g. `Client Error`).
Read official RFC specifications and troubleshooting recommendations.
Copy the status code definition.

Real Working Example

Input:

Search: "404"

Output Result:

HTTP 404 Not Found: The server cannot find the requested resource. Used when a <a href="https://developer.mozilla.org/en-US/docs/Learn/Common_questions/Web_mechanics/What_is_a_URL" target="_blank" rel="noopener noreferrer" class="text-indigo-600 dark:text-indigo-400 font-semibold hover:underline" title="Learn more about URL on official docs">URL</a> is invalid or deleted.

Important Technical Details & Features

Official IANA & RFC Specifications: Complete database of standard IANA HTTP status codes.
Instant Search Indexing: Fast client-side filter by code or keyword.
100% Offline Access: Embedded reference runs in browser memory.

Related Web & SEO Tools

HTTP Header Analyzer: Inspect HTTP response headers.
URL Parser: Parse URL structure.
cURL Builder: Build cURL commands.

Frequently Asked Questions

What is the difference between 301 and 302 redirects?

301 is a permanent redirect passing SEO link equity; 302 is a temporary redirect.

What does HTTP 500 Internal Server Error mean?

HTTP 500 indicates a generic unhandled exception or crash on the web server.

What is 401 Unauthorized vs 403 Forbidden?

401 means authentication is required; 403 means client is authenticated but lacks permission.

Is it free?

Yes, 100% free.

What is the main function of HTTP Status Codes Reference?

Complete reference of HTTP status codes (1xx, 2xx, 3xx, 4xx, 5xx): 200 OK, 301 Redirect, 404 Not Found, 500 Error definitions. This tool processes http status codes reference data 100% locally inside your web browser.