The .H264 extension belongs to files of the type H.264 (also known as MPEG4 part 10) files. These are a type of video codec file which is currently very popular for recording and distribution purposes. This format allows video compression making it a suitable choice for video processing.

The file’s structure is based on the standards stated by the international electronics standards agency ITUT, leading to widespread popularity and development of various extensions for the H.264 file format.It provides lossy compression although practical experiments have been successful in making lossless video formats. Currently this file format is widely used for Blu-ray discs recording and video compression.