The men's 50 metre freestyle competition of the 2018 FINA World Swimming Championships (25 m) was held on 13 and 14 December 2018.

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

The heats were started on 13 December at 10:17.

[2] The swim-off was held on 13 December at 11:45.

[3] The semifinals were started on 13 December at 19:37.