The world's most powerful passports for 2025 have been revealed - but the US and UK have slid down the list compared to last year. Singapore boasts the most powerful passport in the world, with their citizens able to visit an astonishing 195 destinations out of 227 around the globe visa-free. The British passport has slipped down from fourth to fifth place over the last year after being top of the index in 2015. The US also fell in the ranking, from seventh to ninth place, with access to 186 countries visa-free.