Crop Video & Aspect Ratio

Crop frame dimensions and change aspect ratio to 16:9, 9:16 vertical, 1:1 square, or 4:5.

Drop video or audio files here or browse your device

Files are processed locally inside browser memory. No uploads.

.mp4 · .mov · .mkv · .webm•As many files as your device can handle

Privacy-firstNo uploadsProcessed locallyWebCodecs & GPU acceleration active

Frequently Asked Questions

Are my video or audio files ever uploaded?

No. LocalVideoKit processes all media files directly in your web browser using HTML5 File APIs, WebCodecs, and WebAssembly. Your files are never sent to any server or cloud service.

Will removing audio reduce my video quality?

No. When removing audio or stream copying, the original video track is copied bit-for-bit without re-encoding, preserving 100% of the original visual quality.

How this tool works

Crop video dimensions and adjust aspect ratio for TikTok, Instagram Reels, and YouTube Shorts locally.