Does cropping change resolution?
Yes. Cropping changes the visible area, so the exported resolution changes accordingly.
Crop MKV Video Online
Right in your browser. Crop MKV locally and export a new file — no uploads.
FAQ
Does cropping require re-encoding?
Usually yes. Cropping changes pixel layout, so encoding a new file is typically required.
How do I crop to 9:16 vertical?
Select 9:16 in the crop ratio. Combine with rotate/resize when needed.
Which browsers are supported?
The fast path relies on WebCodecs — recommended: latest Chrome / Edge.
Which formats are supported?
Common inputs: MP4/WebM/MOV/MKV. Output containers: MP4/WebM/MOV/MKV.
Are my files uploaded?
No. Processing happens locally in your browser.