ファイル・メディア
ビデオ切り抜き＆サイズ変更
Crop or resize any video — locally, no upload.
Drop a file or click to browse
Scale to width × height
FFmpeg.wasm runs entirely in your browser. The first use downloads ~30 MB of engine — cached for every subsequent run.
編集者注
Understanding · Pick a rectangle, drop the rest.
この詳細な解説章は現在、英語版のみで提供されています。上の変換ツールはあなたの言語で動作しますが、長文の解説記事はまだ翻訳されていません。
よくある質問
Quick answers.
›Is my video uploaded to your server?
No. Processing happens entirely within your browser using WebAssembly. Your original video and the cropped version never leave your computer.
›Which video formats are supported?
The tool supports common containers and codecs including `MP4`, `WebM`, and `MOV`. Support depends on your browser's capability to decode the source file.
›Will cropping reduce the video quality?
The video is re-encoded during the crop. We use high-quality settings by default to ensure the output remains as sharp as the original footage while reducing the frame dimensions.
›Can I crop to specific aspect ratios?
Yes. You can select standard presets like 9:16 for stories, 1:1 for posts, or 16:9 for widescreen, as well as define a custom freeform area.
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