HTTP Status Checker

HTTP status codes are standardized three-digit numbers returned by web servers in response to a client's request made to the server. These codes are part of the HTTP (Hypertext Transfer Protocol) specification and serve as a universal language between web browsers, applications, and servers to communicate the outcome of every request.

Every time you visit a website, click a link, or submit a form, your browser sends an HTTP request to a server. The server processes this request and responds with a status code that tells your browser whether the request was successful, if there was an error, or if additional action is needed (like following a redirect).

The Five Classes of HTTP Status Codes

• 1xx (Informational): The request was received and the server is continuing to process it. These are rarely seen by end users.
• 2xx (Success): The request was successfully received, understood, and accepted. The most common is 200 OK.
• 3xx (Redirection): Further action is needed to complete the request, usually following a redirect to a different URL.
• 4xx (Client Error): The request contains bad syntax or cannot be fulfilled. Common examples include 404 Not Found and 403 Forbidden.
• 5xx (Server Error): The server failed to fulfill a valid request. These indicate problems on the server side.

Why HTTP Status Codes Matter

Understanding HTTP status codes is crucial for various professionals in the web industry:

• Web Developers: Debug API integrations, handle errors gracefully, and ensure proper application behavior.
• SEO Specialists: Identify crawl errors, fix broken links, manage redirects properly, and maintain search engine rankings.
• System Administrators: Monitor server health, diagnose performance issues, and configure proper error handling.
• DevOps Engineers: Set up monitoring alerts, track uptime, and ensure service reliability.

Most Important Status Codes to Know