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User Agent Parser
Analyze and parse a browser/user agent string, showing OS, device, browser, version, and bot detection.
User Agent Analysis Results
Browser Information
Operating System
Device Information
Detection Flags
User-Agent String Anatomy
A User-Agent string identifies the client software (browser, bot, API client) to the server. Typical format: Browser/VERSION (OS; Architecture) Engine/VERSION. Mozilla/5.0 appears in almost all modern browsers for historical compatibility. Bots (Googlebot, Bingbot) identify themselves for robots.txt compliance. API clients (curl, python-requests, Postman) set custom User-Agent strings.