The men's 100 metre freestyle competition at the 2023 World Aquatics Championships was held on 26 and 27 July 2023.

[1][2][3] Prior to the competition, the existing world and championship records were as follows.

[4] The heats were held on 26 July at 10:47.

[5] The semifinals were held on 26 July at 20:26.

[6] The final was held on 27 July at 20:21.