MKV Compressor
Pick a quality, keep what matters. Free, fast, no signup.
One file at a time for now
Batch processing isn't available yet: drop files one by one, or use the Merger to join them.
- Free, no signup
- No watermark, ever
- Files auto-delete in 1 hour
- Nothing to install
MKV is the format that hoards: video, a dozen audio tracks and every subtitle, all in one box. The Matroska container: it will hold practically any codec ever made.
- Born
- 2002, the open-source Matroska project
- Type
- video · container
- Typical size
- as big as whatever you put inside: movie files often run to several gigabytes
- Plays on
- VLC and desktop players love it; smart TVs, Apple devices and editors often don't.
- Fun fact
- Matroska is named after matryoshka nesting dolls: a container built to hold containers.
What compressing MKV actually does
Compressing MKV means re-encoding the video inside with a modern codec at a quality you choose: low, medium or high. Camera footage typically gives up 30–70% of its size before quality visibly suffers, and screen recordings squeeze even harder. MKV runs as big as whatever you put inside: movie files often run to several gigabytes, so there's usually plenty to give.
Questions people ask
How much smaller will my MKV get?
It depends on how generously it was encoded: MKV typically runs as big as whatever you put inside: movie files often run to several gigabytes, and most files give up 30–70% at the medium preset before quality visibly suffers.
Will I lose quality working with MKV here?
Where possible Flippy copies streams without re-encoding; when a re-encode is unavoidable it happens once, at quality matched to your MKV.
Is this MKV compressor really free?
Yes: free for everyday use with no daily cap, no signup, and your files delete themselves from our servers within an hour. Pro exists for heavy days: bigger files, whole folders at once.