A declaration, not proof
Any browser, app or script can send any user agent, so use it for statistics and debugging rather than for security decisions.
EVERYDAY UTILITIES
Free, no signup
User Agent Parser
Decode a user-agent string to see the browser, rendering engine, operating system and device type it claims, including bots.
Percent change
Roof pitch
Board feet
Asphalt
Cubic yards
Gravel
User agent
Phone validator
Speed test
1 User agent
Paste a user agent from server logs or analytics to see what it claims.
Processed in your browser. Nothing is uploaded.
THREE SMALL STEPS
How to read a user agent string
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01
Start with your browser
Your own user agent is filled in automatically, so you can see what websites receive from you.
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02
Paste another one
Paste a user agent from server logs, analytics or a bug report to decode it.
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03
Read the details
Browser, engine, operating system and device type appear as you type, with a warning for bots.
Good to know
Reduced details
Modern browsers share fewer details on purpose, for example by reporting Windows 10 on Windows 11 or an older macOS version.
Decoded locally
The string is decoded in your browser with the open-source Bowser library. Nothing is sent to a server.
QUESTIONS
Frequently asked questions
Can I parse a browser user-agent string from a server log?
Yes. Paste one user-agent string to read its reported browser, operating system and engine. Do not paste an entire log containing private data. User-agent strings can be modified or reduced, so the result is a description of the string, not verified device identity.
What is a user agent?
It is a line of text that browsers and apps send with each request to describe themselves, such as the browser name, its version and the operating system.
Why does Chrome mention Safari and Mozilla?
For historical compatibility, most browsers include the names of older browsers. The parser looks for the most specific name to identify the real one.
Can it detect the exact phone model?
Only when the user agent includes it. Many browsers now hide the device model, so the tool shows the device type instead.