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HTTP Status Codes: Complete Guide from 200 to 503

Complete HTTP status code guide covering all common 1xx-5xx codes, their meanings, use cases, and troubleshooting methods.

HTTP Status Codes Web Development

HTTP Status Codes Guide

HTTP status codes are response codes from servers to client requests, divided into 5 categories.

2xx Success

  • 200 OK - Request successful
  • 201 Created - Resource created
  • 204 No Content - Success with no body

3xx Redirection

  • 301 Moved Permanently - Permanent redirect
  • 302 Found - Temporary redirect
  • 304 Not Modified - Use cached version

4xx Client Errors

  • 400 Bad Request - Malformed request
  • 401 Unauthorized - Authentication required
  • 403 Forbidden - Access denied
  • 404 Not Found - Resource not found
  • 429 Too Many Requests - Rate limited

5xx Server Errors

  • 500 Internal Server Error - Server failure
  • 502 Bad Gateway - Gateway error
  • 503 Service Unavailable - Service down

Use URLCheck to quickly verify any URL’s status code and view complete response headers.

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