Passport Index (English: Passport Index) is a passport ranking website operated by the Arton Capital organization. The Passport Index is the only website in the world that provides a real-time ranking of the passport strength of countries around the world, which is updated every time a new visa waiver program is announced or a change in visas is enacted.

A total of 199 passports are referenced, including those of 193 United Nations Member States and 6 regions (Taiwan, Macau (Macau Special Administrative Region of the People's Republic of China), Hong Kong (Hong Kong Special Administrative Region of the People's Republic of China), Kosovo, the Palestinian Territories and the Vatican). Users can enjoy browsing passports from all countries and regions of the world, studying the design of the passports and sorting them by country, region and even color. In a groundbreaking move, the site allows visitors to compare different passports side-by-side and even learn which passports can help them improve their Global Mobility Score.