Why is my browser UA so long?

Modern UAs bundle engine tokens, compatibility strings, and OS hints— the parser breaks each segment down.

Can it detect mobile or tablet?

Heuristics flag Mobile/Android/iOS, but iPad desktop mode or UA Client Hints can mislead classic UA parsing.

Yes. Paste UA text from curl or server logs to analyze browser and OS fields offline.

Home ToolboxUser-Agent Tool

View and parse browser User-Agent. Detect browser, OS, and device info.

View your User-Agent string and parse browser, OS, and device info with ua-parser-js.

正在载入 UA 解析引擎...

Why is my browser UA so long?: Modern UAs bundle engine tokens, compatibility strings, and OS hints— the parser breaks each segment down.
Can it detect mobile or tablet?: Heuristics flag Mobile/Android/iOS, but iPad desktop mode or UA Client Hints can mislead classic UA parsing.
Can I parse a custom UA string?: Yes. Paste UA text from curl or server logs to analyze browser and OS fields offline.