Which format should I choose?

Use 16:9 for YouTube and landscape video, 9:16 for Shorts and Reels, 1:1 for square posts, and 4:5 for portrait social feeds.

How is the video cropped?

The tool applies a centered crop and exports an MP4. It does not stretch the visible content to fit the new aspect ratio.

No. FFmpeg runs as WebAssembly in your browser, so the source video stays on your device.

Use 16:9 for YouTube and landscape video, 9:16 for Shorts and Reels, 1:1 for square posts, and 4:5 for portrait social feeds.

The tool applies a centered crop and exports an MP4. It does not stretch the visible content to fit the new aspect ratio.

No. FFmpeg runs as WebAssembly in your browser, so the source video stays on your device.

Tools

Center-crop videos for YouTube, Shorts, Reels, and social feeds

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