About UA Parser
User-Agent parser analyzes browser UA string online, identifies browser type/version, OS, device model. Essential for web analytics, compatibility testing, crawler detection.
How to Use
- Paste User-Agent string or auto-detect
- View browser/engine/version info
- View OS and device type
- Batch parse multiple UAs
Frequently Asked Questions
- What is User-Agent?
- UA is identity string sent by browser to server, contains browser type, version, OS, device etc. Server uses it to optimize content or track visitors.
- Why does Chrome UA contain Safari?
- Historical compatibility. Chrome based on WebKit (later Blink) engine, UA includes 'Safari' for old website compatibility. Similarly, all modern browsers contain 'Mozilla'.
- Can UA accurately identify crawlers?
- Partially. Legitimate crawlers (Googlebot/Bingbot) have distinctive UAs. But malicious crawlers forge UAs mimicking real browsers. Needs combined IP/behavior/fingerprint analysis.