What happens when you HIT a URL?

When you hit a URL in your browser, a complex yet lightning-fast process unfolds behind the scenes. It all begins when your browser, such as Google Chrome, parses the URL into components like protocol, domain, and path. Next, it performs a DNS lookup to translate the domain name into an IP address, often using services like Google Public DNS.

Once the IP address is found, the browser establishes a connection with the server using the Transmission Control Protocol (TCP). This involves a quick handshake process to ensure both client and server are ready to communicate. If the request is over HTTPS, an additional security layer is added using Transport Layer Security (TLS), encrypting the data exchanged.

After the connection is secure, the browser sends an HTTP request via the Hypertext Transfer Protocol. The server—often powered by tools like Nginx—processes this request. It may fetch data, run backend logic, or query databases before preparing a response.

Finally, the server sends back the requested content, and the browser begins rendering it. HTML is parsed into a structure, styles are applied, and JavaScript (executed by engines like V8 JavaScript engine) brings interactivity. Within milliseconds, the webpage appears on your screen.

What feels like a simple click is actually a finely tuned orchestration of networking, security, and computing working seamlessly together.