The men's 100 metre freestyle event at the 11th FINA World Swimming Championships (25m) took place 15 – 16 December 2012 at the Sinan Erdem Dome in Istanbul, Turkey.

Prior to this competition, the existing world and championship records were as follows.

No new records were set during this competition.

[1] [2] The final was held at 19:00.

[3]