MKV file format
Matroska Video · Video · .mkv
or drag & drop videos, audio or images here, or paste with Ctrl+V
MP4 · MOV · MKV · AVI · WebM · WMV · FLV · GIF · MP3 · WAV · M4A · and 40+ more
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MKV (Matroska) is a flexible open container that can hold almost any video, audio and subtitle tracks in one file. Popular for movies and archiving.
Technical details
| Full name | Matroska Video |
|---|---|
| File extension | .mkv |
| MIME type | video/x-matroska |
| Video codecs we export | H.264 / AVC (most compatible), MPEG-4 Part 2 / Xvid, VP8 (WebM) |
| Audio codecs we export | AAC, Opus, MP3, FLAC (lossless), Vorbis, Dolby Digital AC-3 |
| Best for | Movies, multiple audio/subtitle tracks and archiving |
Last updated 2026-11-13
MKV conversions
MKV FAQ
What is a MKV file?
MKV (Matroska Video) is a video format. MKV (Matroska) is a flexible open container that can hold almost any video, audio and subtitle tracks in one file. Popular for movies and archiving.
How do I open a MKV file?
Most modern players such as VLC open MKV files. If yours doesn't, convert it to MP4 above, which plays on every device.
How do I convert a MKV file?
Drop the file into the converter on this page, choose the output format and click “Convert & download”. It's free and runs in your browser without uploading.
What is MKV best for?
Movies, multiple audio/subtitle tracks and archiving.