What Websites Can See About Your Browser, and What a Browser Fingerprint Is

Every time you open a website your browser hands over certain details without asking permission. Combined, the values can tell you apart from other people.

What a site can read

• Language and time zone.
• Screen size.
• CPU count and graphics card information.
• A canvas-based fingerprint value.

The browser fingerprint

Each value alone may match many other people, but together they are often unique, which lets a site recognise you even without cookies.

What this tool does

It only reads the values and shows them to you; nothing is sent anywhere. A parser box turns any User-Agent into a browser, operating system, device or bot.

Reducing how identifiable you are

Some browsers include fingerprint protection, and installing extra add-ons can make your fingerprint stand out more.