Complete guide to understanding every HTTP status code. Learn what each code means in plain English, common causes, how to fix errors, and the impact on SEO and user experience.
Quick reference for the status codes you'll encounter most often
Enter a status code to see detailed information
HTTP status codes are three-digit numbers returned by servers to indicate the result of a request. They're essential for understanding what's happening between your browser and a website's server. Whether you're debugging, optimizing for SEO, or monitoring uptime, understanding status codes helps you quickly identify and resolve problems.
Indicate that the request was received and the process is continuing. Rarely seen by end users.
The request was successfully received, understood, and accepted. Everything worked as expected.
Further action needs to be taken to complete the request. The resource has moved or additional steps are required.
The request contains bad syntax or cannot be fulfilled due to client-side issues.
The server failed to fulfill an apparently valid request. These need immediate attention.
Don't wait for users to report errors. Site Qwality monitors your website continuously and alerts you immediately when status codes indicate problems — from 404 errors to server failures.