Parse a User-Agent string into browser, engine, OS, and device info
User-Agent string
Pre-filled with your current browser's UA. Paste a different one to inspect it.
About User-Agent parsing
What this tells you
The UA string is a self-reported identifier sent by browsers. It commonly includes browser name and version, rendering engine, OS, and device hints. Use it for stats and feature gating, not security.
Reliability
Many modern browsers freeze or reduce UA detail. For accurate capabilities, prefer feature detection and the User-Agent Client Hints API where available.