Networking & HTTP
User-Agent Parser
Parse browser, OS, device, engine, and bot hints from User-Agent strings.
About User-Agent Parser
User-Agent Parser extracts browser, operating system, device, engine, and bot hints from user-agent strings for diagnostics and support cases.
Common uses
- Interpret a browser string from server logs.
- Check whether a crawler or automation tool is identifying itself.
- Compare desktop and mobile user-agent examples.
Good to know
User-agent strings can be incomplete or spoofed. Treat parsed results as hints, not a strong identity or security signal.
How to interpret results
Use parsed user-agent details as support and analytics hints, not proof of identity. Browsers, crawlers, proxies, and automation tools can omit or spoof parts of the string.
Good support workflow
Compare the parsed browser, operating system, rendering engine, and device hints with the user's reported issue. That context helps reproduce layout and compatibility problems.
Common mistakes
Do not use user-agent parsing as a security boundary. Feature detection and server-side authorization are more reliable than trusting a client-supplied string.
Before you rely on the output
- Compare parsed or generated HTTP details with the API, gateway, browser, or server that will actually process the request.
- Privacy mode: inputs are processed locally in your browser and are not intentionally sent to an application server.