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HTTP Status Code Reference

Complete HTTP status code reference guide with detailed descriptions, usage examples, RFC references, and practical guidance for web developers and API designers.

Input

3 characters

Output

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How It Works

Privacy First

This http status code reference processes your data entirely in your browser. No data is uploaded to any server, ensuring complete privacy and security.

Lightning Fast

Instant processing with real-time validation and error detection. No waiting, no delays - just immediate results.

Versatile Use Cases

  • API development and debugging
  • Web development troubleshooting
  • Learning HTTP protocol standards

Mobile Friendly

Responsive design that works perfectly on all devices and screen sizes. Touch-friendly interface for mobile users.

Frequently Asked Questions

What are the main HTTP status code categories?
1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error). Each category indicates the type of response from the server.
When should I use 422 vs 400?
Use 400 for malformed requests (syntax errors), and 422 for well-formed requests that fail semantic validation (business logic errors).
What's the difference between 401 and 403?
401 means authentication is required or failed (login needed), while 403 means the user is authenticated but lacks permission for the resource.
Which status codes are most commonly used?
Most common: 200 (OK), 201 (Created), 204 (No Content), 301/302 (Redirects), 400 (Bad Request), 401 (Unauthorized), 403 (Forbidden), 404 (Not Found), 422 (Unprocessable Entity), 500 (Internal Server Error), 502 (Bad Gateway), 503 (Service Unavailable).
How do I choose between 301 and 302 redirects?
Use 301 for permanent redirects (SEO juice transfers, caching encouraged) and 302 for temporary redirects (original URL will be used again).

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