Crop MKV Online - Free
Cut the edges off an MKV or reframe it to a new shape, and download it as MKV again. Free, nothing to install.
- Free to start
- Nothing to install
- Up to 1GB
Crop MKV in 3 steps
Upload your MKV
Drag and drop the MKV file, or click to browse. Anything under 1GB.
Pick a ratio
16:9, 9:16, 1:1 or 4:5. The crop is taken from the centre, and the preview shows what stays in the frame.
Crop and download
The output is already set to MKV. Create a free account to download it.
Cropping an MKV and keeping it an MKV
MKV (Matroska) is an open container that can hold any codec plus unlimited audio tracks, subtitle tracks and chapters. That flexibility makes it great for archives and useless for sharing.
The output format is set to MKV before you start, so what you download is the same kind of file you uploaded: nothing downstream that expects an MKV has to be told about a new format. If you would rather have something that plays everywhere, run the result through the MKV to MP4 converter.
Container
Typical codecs
Plays on
File size
| Feature | MKV |
|---|---|
| Container | Matroska |
| Typical codecs | Almost anything: H.264, HEVC, AV1, VP9 |
| Plays on | VLC and desktop players; rarely anywhere else |
| File size | Depends entirely on the codec inside |
Before you crop an MKV
An MKV often holds several audio languages and subtitle tracks. Converting renders one video and one audio track, so extra languages and embedded subtitles are not carried over; add captions in the editor instead.
Browsers, iPhones and most upload forms do not accept MKV, which is why a file that plays in VLC still needs converting before it can be shared.
Crop MKV: questions
Will it stay an MKV?
Yes. The output is pre-set to MKV, so the cropped file downloads as MKV. For MP4 instead, run the result through the MKV to MP4 converter.
Does cropping an MKV lose quality?
The part you keep is re-encoded once at a high quality target, so it is not bit-for-bit identical, but it is indistinguishable at normal playback. Editing the same file over and over will eventually show, so keep your original.
Is cropping MKV free?
Yes. Crop and preview free, and a free account downloads the result. Free exports and share pages include a small REQO badge. Go Pro to remove it.
Other presets
Everything else you can do here.
All crop video presets
Resize to a resolution
Compress for a destination
Compress a format
Rotate or flip
Change the frame rate
Change the speed
Transcribe a language
Merge with a transition
Extract audio from a format
Subtitles in another language
Convert a caption file
Need more than crop mkv?
REQO is a full browser video editor: record, edit by transcript, caption and export.