DivX is a brand of video codec products developed by DivX, LLC. The DivX codec is notable for its ability to compress lengthy video segments into small sizes while maintaining relatively high visual quality.

There are three DivX codecs; the original MPEG-4 Part 2 DivX codec, the H.264/MPEG-4 AVC DivX Plus HD codec and the High Efficiency Video Coding DivX HEVC Ultra HD codec. It is one of several codecs commonly associated with "ripping", whereby audio and video multimedia are transferred to a hard disk and transcoded.