What is User Agent Parser Online?
The HTTP User-Agent header identifies the client making a request. Parsing it extracts browser family (Chrome, Firefox, Safari), version, OS, device category (desktop/mobile/tablet), and rendering engine. Essential for analytics, compatibility debugging, and bot detection.
How to Use User Agent Parser Online
- Your current User-Agent is pre-filled.
- Paste any User-Agent string to parse it.
Frequently Asked Questions
Why do all browsers include "Mozilla" in their User-Agent?
For historical compatibility. When Netscape (Mozilla) dominated, sites checked for "Mozilla". All other browsers added it to avoid being excluded.