HandBrake

HandBrake is a GPL‑licensed video transcoder that converts media files from a wide range of source formats into a selection of modern, widely supported codecs. It supports common container types and can output to formats such as MP4 and MKV, allowing users to create files that play on contemporary devices and platforms.

The tool runs on Windows, macOS, and Linux and leverages multithreading to process video efficiently. Its graphical interface and command‑line options give users flexibility in batch processing, preset selection, and fine‑grained control over encoding parameters such as resolution, bitrate, and audio tracks.

Because it is open source and freely available, HandBrake is suited for individuals, hobbyists, and organizations that need reliable, cost‑free video conversion without proprietary restrictions. The project is maintained by volunteers and is considered stable for production use.