User-Agent Parser Online — Detect Browser and Operating System
Parse a User-Agent string online to identify common browsers, engines, operating systems and mobile hints locally.
About this tool
This lightweight parser uses recognizable tokens for Edge, Firefox, Chrome, Safari, major operating systems, rendering engines and mobile indicators.
How to use
- Paste a User-Agent or leave blank for the current browser.
- Run the parser.
- Review the structured JSON result.
Features
- Browser and OS detection.
- Engine and mobile hints.
- Current browser fallback.
Common use cases
- Inspect request logs.
- Debug device-specific behavior.
- Read analytics samples.
Common issues and tips
- User-Agent strings can be spoofed.
- Simplified detection does not identify every browser or version.
Privacy
Parsing runs locally.
Frequently asked questions
Does blank input work?
Yes, it uses navigator.userAgent.
Is detection guaranteed?
No. Strings can be ambiguous or spoofed.
Does it contact the device?
No, it only examines text.