Parse a User-Agent string online

How it works

1. 1

   Paste a User-Agent string, or press the button to use your own.

2. 2

   Read the browser and version.

3. 3

   Check the operating system and device type.

About the User-Agent Parser

Every browser sends a User-Agent string that names its engine, version and operating system, but the format is long and full of historical tokens such as Mozilla/5.0 and like Gecko. This parser picks out the browser, version, operating system and device type from a string you paste or from your own browser, which helps when reading server logs and bug reports.

What you can do

• Identify Chrome, Edge, Firefox, Safari, Opera, Chrome on iOS and Internet Explorer, with their version numbers.
• Detect Windows (with versions such as 7, 8.1 or 10/11), macOS, Android, iOS and Linux.
• Classify the device as desktop, mobile or tablet.
• Load the User-Agent of the browser you are using with one button.

When it works best

• Working out which browser a customer used from the User-Agent in a bug report or support ticket.
• Reading entries in an access log while debugging a problem that affects one platform.
• Checking what your own browser reports when testing device detection in your app.

Things to know

• Parsing is done in your browser with pattern matching.
• Windows 10 and 11 send the same version token, so they cannot be told apart from the string alone.
• Less common browsers such as Samsung Internet or Brave are reported as the browser they are built on, and bots or crawlers are not detected.
• Browsers increasingly reduce the detail in User-Agent strings. To read a whole set of request headers, use the HTTP Header Viewer.

Frequently asked questions