My user agent

My User Agent displays the exact user agent string your browser sends to websites, along with a clear breakdown of its meaning. This tool is designed for developers, testers, network administrators, and everyday users who want to understand how their browser identifies itself online.

At a glance, you can see your browser name and version, operating system, device type, and other technical details that make up your browser’s digital fingerprint. No extensions. No setup. Just open the page and get the data.

What is a user agent?

A user agent is a string automatically sent by your browser whenever you visit a website. It tells the web server which browser you are using, which operating system you are running, and, often, the type of device you are browsing from.

This information helps websites decide how to deliver their content. That is how a site knows whether to load a mobile or desktop layout, and why some features behave differently across Chrome, Edge, Firefox, and Safari.

In short, your user agent is how your browser introduces itself to the web.

Why user agents exist

The web is accessed from an enormous range of devices, from phones and tablets to laptops, desktops, and specialized hardware. User agents exist so that servers can respond intelligently rather than delivering the same experience to everyone.

When a website receives a request, it reads the user agent and adapts accordingly. This can include layout changes, feature support, performance optimizations, or even security decisions.

Without user agents, many modern websites would either break or be forced to deliver a one-size-fits-all experience that works poorly everywhere.