Individual events Each National Federation was permitted to enter a maximum of two qualified athletes in each individual event, but they could do so only if both of them had attained the "A" standard qualification time in the event at a
World Aquatics certified competition between 9 March 2024 and 29 June 2025. Federations could enter one athlete into the event if they met the "B" standard qualification time. Athletes could also enter the event if they had met an A or B standard in a different event and their Federation had not entered anyone else.
Relay events Each National Federation could enter one team in each relay. The team had to be composed of swimmers who were also competing in the individual events, along with relay only swimmers who had to have met the B standard for the corresponding stroke and distance they would be swimming in the relay. Federations were only allowed to enter two relay-only swimmers for each relay they entered. ==Schedule==