Set aspect ratio and export a resized WebM
Click or drag and drop your video here
Original: -
Height adjusts automatically to keep the selected aspect ratio.
Playback shows how the crop will look. Use aspect ratio to adjust.
Use this tool when you need a specific aspect ratio for a platform—16:9 for YouTube, 9:16 for TikTok/Reels/Shorts, or 1:1 for feeds. It’s best for reframing a clip quickly and exporting a resized version. Limitation: exporting can take time on long videos, and the output is WebM (great for web and many editors, but not every app).
Input
landscape.mp4 1920 × 1080
Output
vertical.webm Aspect: 9:16, Width: 720
Input
clip.mov Original aspect
Output
clip-square.webm Aspect: 1:1, Width: 720
Set an aspect ratio (like 16:9 or 9:16), choose an output width, preview the framing, then export a resized WebM.
Click “Choose Video” or drag-and-drop a file to open crop settings.
Set a Width (px) and choose an Aspect Ratio. The height updates automatically.
Use the Preview player to confirm the crop looks right for your target platform.
Click “Export Cropped Video” and download the result when it’s ready.
Runs locally in your browser — your video isn’t uploaded.