User-Agent lookup
Identify browser, operating system, device type and rendering engine locally using explicit User-Agent rules.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
User-Agent
Detection result
Only fields supported by explicit rules are shown.
Enter a User-Agent to see the result
: 0 · : 0 · : 0 · : 0
What this tool does
- Inspect browser compatibility input offline.
- Identify common desktop and mobile User-Agents.
- Check rendering-engine rule matches.
Example
Input
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 Version/17.1 Mobile/15E148 Safari/604.1
Output
{
"browser": "Safari",
"version": "17.1",
"os": "iOS 17.1",
"device": "mobile",
"engine": "WebKit"
}Only explicit UA tokens are used; fields that cannot be identified reliably return unknown.
Frequently asked questions
Does it identify every browser?
No. Only declared rules are covered; other values are unknown.
Is the UA sent to a server?
No. Parsing runs entirely in the browser.
Can Windows 10 and 11 be separated?
No. Common UA data cannot reliably distinguish them, so it reports Windows 10/11.
Keywords：User-AgentUA浏览器browserdevice