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User-Agent Parser
Parse a User-Agent string into browser, engine, OS and device information.
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About User-Agent Parser
The User-Agent header is a free-form string that browsers send with every HTTP request. Despite efforts to freeze and reduce it, it still encodes the browser family, version, rendering engine, operating system and often the device model.
Paste any User-Agent below to see the parsed structure. Your browser's current UA is detected automatically.
Frequently asked questions
Why are User-Agents so messy?
Historic compatibility, every browser added 'Mozilla/5.0' and engine tokens to be detected as the dominant browser of its time.
Is User-Agent reliable?
No, it can be spoofed by clients and is being gradually replaced by Client Hints (Sec-CH-UA-* headers).
Is the value sent to a server?
No, parsing runs entirely in your browser.
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