User Agent Parser
Parse and analyze User-Agent strings to extract browser, OS, device, and engine info.
What is a User-Agent string?
A User-Agent string is an HTTP header sent by browsers to identify themselves to web servers. It contains information about the browser name, version, operating system, device type, and rendering engine.
Why do different browsers have similar UA strings?
Most modern browsers are based on similar engines (Chromium/Blink) and include compatibility tokens in their UA strings to ensure websites serve them proper content, which makes them look similar.
Can User-Agent strings be spoofed?
Yes, User-Agent strings can be easily modified or spoofed. Browsers offer built-in or extension-based UA spoofing features, so UA-based detection should not be relied upon for security purposes.
What is UA-CH (User-Agent Client Hints)?
UA-CH is a modern replacement for the traditional User-Agent string. It provides structured, privacy-preserving headers that give servers only the specific information they need, reducing passive fingerprinting.