What Is My User Agent?
This is the user-agent string your browser sends to every website, and what it says about you.
Your Browser's User-Agent String
Every time your browser loads a page, it sends a short line of text that names itself and your system. This page opens the User-Agent Parser with your own string, explains each part, and shows what your browser reports through Client Hints.
What it reveals, and what it hides
A user agent names the browser, its major version, the engine, the operating system and whether the device is a phone. It does not include your name, your IP address or your location. Modern browsers also leave details out on purpose: the exact browser version, the Android phone model and whether Windows is 10 or 11. Sites that need those details ask for Client Hints instead.
Changing it for testing
In Chrome and Edge, open the developer tools, then the Network conditions panel, and untick the default user agent. Firefox has a similar setting in its responsive design mode. The device toolbar in all three also switches the user agent when you pick a phone.
Related tools
To read a user agent from a log or a report, paste it into the User-Agent Parser.