HTTP Status Code Cheat Sheet — Every 1xx–5xx Code Explained
Look up every HTTP status code from 100 to 599, with plain-language causes and fixes for both backend and frontend
From 200 OK to 404 Not Found and 500 Internal Server Error, search any HTTP status code to instantly see what it means, why it happens, and how to fix it.
도구를 불러오는 중…
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Type a code number (like 401) or its name into the search box.
- Read the cause and the recommended fix for that error.
FAQ
- What's the difference between 4xx and 5xx errors?
- 4xx codes mean something's wrong with the client's request — bad permissions, a wrong URL, and so on. 5xx codes mean the backend server itself failed or got overloaded.
- What's the difference between a 301 and a 302 redirect?
- 301 is permanent — search engines move their index to the new URL. 302 is temporary, so the original URL stays indexed.
- Are 1xx and 3xx codes covered too?
- Yes, every code from 100 (Continue) through 599 (Network Authentication Required) is searchable in one place, with its name and how to handle it.