文件与媒体
视频裁剪器与调整器
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.
编辑注
Understanding · Pick a rectangle, drop the rest.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
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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