Observed arrival · 2026-09-22
The User Agent, Explained Fragment by Fragment
A free parser that identifies a browser’s user-agent string by browser, operating system, engine, device, CPU, and individual tokens.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Web developers, browser testers, and privacy-conscious users
- Worth noticing
- It separates legacy UA fragments from Client Hints and explains why modern browsers freeze identifying values.
Field notes
The page handles two related inputs: it can display the browser’s current user-agent string, or analyze a string pasted into the field. Its breakdown pairs fragments with meanings and separates the legacy string from navigator.userAgentData Client Hints. The reference explains compatibility tokens such as Mozilla/5.0 and frozen Windows, macOS, and Android values, while the page states that user-agent data is not uploaded or stored. Ten language options are visible.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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