Question 1

Is User-Agent parsing safe?

Accepted Answer

Yes, it's safe. Parsing is done entirely locally in your browser; the input User-Agent string is not uploaded to any server.

Question 2

Why is a string of text displayed by default?

Accepted Answer

The tool automatically fills in your current browser's User-Agent as an example, allowing you to immediately see your device information. You can also clear it and paste any User-Agent to parse.

Question 3

Why do some fields show 'Unknown'?

Accepted Answer

User-Agent is declared by each browser. Some older, customized, or privacy-protective UAs may not include certain information (such as CPU architecture or system version), in which case the corresponding field will show 'Unknown'.

User-Agent Parser

Frequently Asked Questions