Does cropping change resolution?

Yes. Cropping changes the visible area, so the exported resolution changes accordingly.

Does cropping require re-encoding?

Usually yes. Cropping changes pixel layout, so encoding a new file is typically required.

Select 9:16 in the crop ratio. Combine with rotate/resize when needed.

The fast path relies on WebCodecs — recommended: latest Chrome / Edge.

Common inputs: MP4/WebM/MOV/MKV. Output containers: MP4/WebM/MOV/MKV.

No. Processing happens locally in your browser.

Powered by WebCodecs. Crop the frame locally and export a new file — perfect for turning landscape footage into vertical, square, and more.