Video format · .mkv
MKV (Matroska) is the open, feature-rich container for serious video libraries: multiple audio tracks, embedded subtitles, chapters, and attachments in one file. Rips, anime collections, and archives live in MKV — convert to MP4 when a device or platform refuses it.
Every tool runs in your browser — files never leave your device. Badges say exactly what each tool does with MKV.
Convert it to MP4 with the video converter — transcoding runs locally via FFmpeg and the result plays on virtually everything.
Audio extraction to MP3 works locally. For subtitle tracks, the converter keeps them when the output container supports them.
Re-encoding sheds a little detail, like any transcode. For maximum fidelity keep the MKV as your archive and convert copies for playback.
Completely. Transcoding runs in your browser with local FFmpeg; no video is uploaded.