User Agent Parser — Decode Browser, OS & Device
Paste any browser user agent string and instantly see its browser, version, operating system, device type, and rendering engine. Free, client-side UA parser.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
0 / 100M Limit
Common Use Cases
Debugging device-specific bugs
Paste a user agent string from a bug report or server log to identify exactly which browser, OS, and device it came from.
Auditing analytics or log data
Decode raw user agent strings pulled from access logs or analytics exports during manual review.
Frequently Asked Questions
- How accurate is the parsing?
- It uses pattern matching tuned for the major desktop and mobile browsers (Chrome, Firefox, Safari, Edge, Opera) and common operating systems — not an exhaustive UA-parsing library, so obscure or spoofed user agents may not be recognized correctly.
- Where do I find my own browser's user agent to test this?
- Open your browser's developer console and run navigator.userAgent, or search "what is my user agent" — then paste the result here to see it broken down.
- I want to generate a fake user agent instead of parsing a real one — is that this tool?
- Not this one — this page decodes existing UA strings. Use the Fake User Agent Generator to create a random one for testing.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.