用户代理检测

实用链接

将此浏览器信号与 IP 隐私和 IP 地址基础知识进行比较。

Understanding browser signals

The User-Agent string is a compatibility summary sent by browsers. It can still hint at family, platform, and device but is increasingly shortened or spoofed.

Use this page to compare your current signal against what you expect from your security and privacy assumptions.

Why this matters

• Detecting weak fingerprint signals when debugging analytics mismatch.
• Explaining to users why some sites request legacy compatibility.
• Reviewing where user-agent based filtering can be bypassed or misread.