APIs
HTTP Status Codes — The Complete Developer Reference
Complete guide to HTTP status codes. 2xx success, 3xx redirects, 4xx client errors and 5xx server errors with examples.
Overview
This article covers everything you need to know about HTTP Status Codes as a developer. Use the interactive tool below to practice what you learn.
Why This Matters
Understanding HTTP Status Codes is essential for modern development. Whether you are building APIs, configuring servers or writing client-side code, you will encounter this regularly.
Key Concepts
- The fundamentals you need to understand
- Common patterns and best practices
- Real-world examples from production systems
- Common mistakes and how to avoid them
Practical Examples
The best way to learn is by doing. Use our free HTTP Status Codes tool to practice with real examples — no login required.
Practice with our free tool
Try our HTTP Status Codes — runs in your browser, no login needed.
HTTP Status Codes →