HandBrake is a free and open-source video transcoder that allows users to convert video files from one format to another. It supports a wide range of formats, making it easy to optimize videos for various devices, such as smartphones, tablets, and computers. The software is available for multiple operating systems, including Windows, macOS, and Linux. With a user-friendly interface, HandBrake offers features like batch processing, video compression, and customizable settings for advanced users. It is commonly used for ripping DVDs and converting high-definition videos, ensuring that users can enjoy their media in the best possible quality on their preferred devices.