Each aspect of a TOS or privacy policy is assessed as positive, negative, or neutral.

Services are graded from A (best) to E (worst) once a comprehensive list of cases has been reviewed by volunteer curators.

[1] The project was founded in June 2012 by Hugo Roy, programmer Michiel de Jong, and designer Jan-Christoph Borchardt.

The project offers a browser extension for Google Chrome, Microsoft Edge, Apple Safari, Mozilla Firefox and Opera, which shows the grade and a short description of the privacy policy if a website is compatible.

[8][9] Several sources of inspiration have been noted for ToS;DR, including Creative Commons' plain English summaries of licenses, EU energy efficiency ratings,[10] and Aza Raskin's Privacy Icons.