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User Agent Viewer

See the exact user agent string your browser sends to websites, plus a readable breakdown of your browser, OS and device details.

Your user agent

This is the exact string your browser sends to websites.









Detected details





        

      


      
      
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What a user agent is

          
Every time your browser loads a page, it introduces itself with a user agent string: a line of text naming the browser, its version, the operating system and the device. Websites read it to serve the right layout, offer the correct download, or block outdated browsers. This page simply shows you what yours says.

        

        

          
Why the string looks so messy

          
Decades of compatibility hacks are baked in. Nearly every browser still starts with Mozilla/5.0 for historical reasons, then piles on tokens for the rendering engine, OS and device. The readable breakdown below decodes the important parts for you.

        

      


      

        
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User Agent Viewer FAQs

        

          What is my user agent used for?
          
Websites use it to detect your browser and OS, serve mobile or desktop layouts, offer the right app download, and collect analytics about their visitors.

        

        

          Can websites identify me from it?
          
Partly. The string alone rarely identifies you personally, but combined with screen size, fonts and other signals it contributes to browser fingerprinting.

        

        

          Why does my Chrome user agent mention Safari?
          
For compatibility. Chrome's string includes Safari and KHTML tokens because early sites served better pages to Safari-identified browsers, and the convention stuck.

        

        

          Can I change my user agent?
          
Yes. Most browsers let you override it in developer tools, and extensions can spoof it per site, which is useful for testing how pages look on other devices.

        

        

          Is any of this data sent to a server?
          
No. Everything on this page is read from your browser's own JavaScript APIs and displayed locally.

        

      


      
      
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