A research project of the Electronic Frontier Foundation

Panopticlick — How Unique, and Trackable, Is Your Browser?

Is your browser configuration rare or unique? If so, web sites may be able to track you, even if you limit or disable cookies.

Panopticlick tests your browser to see how unique it is based on the information it will share with sites it visits. Click below and you will be given a uniqueness score, letting you see how easily identifiable you might be as you surf the web.

Only anonymous data will be collected by this site.

Click here to test how trackable your browser is.

A paper reporting the statistical results of this experiment is now available: How Unique Is Your Browser?, Proceedings of the Privacy Enhancing Technologies Symposium (PETS 2010), Springer Lecture Notes in Computer Science.