Q: What is a User Agent string?
A User Agent string is sent by browsers and HTTP clients to identify themselves to web servers. It typically includes the browser name, version, OS, and rendering engine.
Q: Why do browsers include other browser names in their UA?
For historical compatibility reasons, browsers include identifiers of other browsers. For example, Chrome includes "Safari" and "Mozilla" in its UA string to ensure websites serve content correctly.
Q: What are rendering engines?
Rendering engines process HTML/CSS to display web pages. Major engines include Blink (Chrome, Edge, Opera), WebKit (Safari), and Gecko (Firefox).
Q: Is UA parsing always accurate?
UA parsing is heuristic-based. Users and bots can spoof UA strings. However, for legitimate browsers, parsing is highly reliable. This tool uses pattern-matching optimized for modern browsers.
Q: Is my data secure?
Yes. All parsing is done entirely in your browser using JavaScript regex. No data is sent to any server.