MKV Editor Extractor is a free Android application developed by sums, designed to edit and extract MKV files. It offers support for various file formats, such as mkv, webm, mov, mp4, m4a, m4v, etc., making it a versatile option for users who work with different file types.

The application provides a range of features, including extracting and adding subtitles (srt, ass, sub), audio (aac, ac3, eac3, dts, flac, mp3, thd), and attachments. Users can also edit tags and chapters, making it easier to navigate and organize large files. Additionally, the application offers the option to convert mp4 to mkv, simplifying the process of file conversion.

Overall, MKV Editor Extractor is a comprehensive tool for editing and managing MKV files, with a user-friendly interface and a wide range of supported formats. It is a valuable addition to any Android user's toolkit.