Sec,ch,ua,arch:,""x86"" (macOS PRO)

Historically, developers had to "sniff" the User-Agent string—a messy process prone to errors and spoofing. Sec-CH-UA-Arch provides a cleaner, structured way to:

If you need this information on the client side, you can use the NavigatorUAData API . Because it is high-entropy data, it returns a Promise: Detecting Microsoft Edge from your website sec,ch,ua,arch:,""x86""

To see this header in your server logs, you must first "opt-in" by sending an Accept-CH response header to the browser. : On the next request, the browser will

: On the next request, the browser will include: Sec-CH-UA-Arch: "x86" Accessing via JavaScript : On the next request

Understanding Sec-CH-UA-Arch : The Future of CPU Detection As the web moves away from bulky, privacy-invasive User-Agent strings, a new standard has emerged: . One of the most specific hints for developers today is Sec-CH-UA-Arch , which identifies the underlying CPU architecture of a user's device. What is Sec-CH-UA-Arch: "x86" ?