A User-Agent is a string of text that your web browser sends to every website you visit, identifying your browser type, version, and operating system.

It uses a robust client-side parsing library to instantly dissect the complex User-Agent string into readable metrics like OS, Browser, Device, and Engine.

Developers use User-Agent parsing to gather analytics, debug browser-specific layout issues, or block unsupported browsers from accessing their applications.

Yes. User-Agents are easily modified using browser extensions or developer tools, meaning they are not 100% reliable for critical security checks.

Absolutely. The parsing happens entirely in your browser using JavaScript. The User-Agent strings you test are never sent to our servers.

Yes, the UA PARSER tool is completely free with no usage limits, sign-ups, or subscriptions required.

No. We do not store or log any of the data you check or record using our tools.

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