About User-Agent Parser
Paste any User-Agent string to see the detected browser, version, operating system, and device type. Or use "Use my browser's User-Agent" to parse the current browser. Helpful for debugging, support, or documentation.
Frequently Asked Questions
What is a User-Agent string?
The User-Agent is a string that browsers and apps send with HTTP requests to identify themselves (browser name, version, OS). Servers and logs use it for analytics or compatibility.
Is my User-Agent sent to a server?
When you click "Use my browser", we only read navigator.userAgent in your browser. When you paste a string, we parse it locally. Nothing is sent to our servers.
Why does parsing differ from other tools?
Different libraries or rules can produce slightly different results. We use ua-parser-js, which is widely used and maintained.