The Men's 100 Freestyle at the 10th FINA World Swimming Championships (25m) was swum 18 – 19 December in Dubai, United Arab Emirates.

On 18 December 125 individuals swam in the Preliminary heats in the morning,[1] with the top-16 advancing onto Semifinals that evening.

[2] The top-8 from Semifinals then advanced to the final the next evening.

[3] At the start of the event, the existing World (WR) and Championship records (CR) were as follows.

The following records were established during the competition: