User Agent Checker

What is a user agent?

A user agent is a short text string your browser automatically sends with every request it makes to a website. It identifies the software acting on your behalf — typically your browser name and version, the layout engine it uses, and the operating system and device it is running on. The string exists so that servers can deliver content that works for your setup, but in practice it has become one of the most widely read signals about who is visiting a site.

What does your user agent reveal?

From the user agent alone, a website can usually tell whether you are on Windows, macOS, Linux, Android or iOS, which browser and major version you are running, and whether you are on a phone, tablet or desktop. Combined with the extra signals above — your language preferences, screen size, number of CPU cores, available memory and whether cookies are enabled — it forms a surprisingly detailed picture of your device.

Why it matters for privacy and fingerprinting

On its own a user agent is not unique, but trackers rarely stop there. Browser fingerprinting combines the user agent with dozens of other attributes — fonts, screen metrics, hardware details and more — to build an identifier that can follow you across sites even without cookies. A detailed or unusual user agent makes you easier to single out, which is why privacy-focused browsers increasingly try to make this string generic.

Reduce what you expose

You can't fully hide your user agent without breaking sites, but you can stop tying it to your real network identity. ProxyMule hides your IP address while you browse, so even if a site reads your user agent it can't link it to your real location — no download or account needed.

Frequently asked questions

Can I change my user agent? Yes — most browsers and extensions let you spoof it, but mismatched values can make you more identifiable, not less, because the fake string conflicts with other detectable signals.

Is the user agent the same as my IP address? No. The user agent describes your software and device; your IP address identifies your network connection. Sites typically read both together.

Why do two browsers show different user agents on the same computer? Each browser reports its own name, version and engine, so the strings differ even though the underlying operating system is identical.