Video Tools
Video Resizer
Resize, crop, and change the aspect ratio of videos for any platform.
Your files stay on your device - processed locally via WebAssembly, never uploaded
Drop a video file or click to upload
MP4, WebM, MOV
Your videos are processed locally. Nothing is uploaded.
Embed this tool on your website
Copy this code to add the Video Resizer to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/video-resizer" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Video Resizer by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/video-resizer">OptiPix Video Resizer</a></p>
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About Video Resizer
Last updated: May 2026
OptiPix Video Resizer 可在您的浏览器中直接更改视频尺寸、分辨率和宽高比。您可以选择标准分辨率（1080p、720p、480p）或自定义尺寸。提供适用于 Instagram Reels、TikTok、YouTube 等社交媒体的预设。宽高比选项：保持原始、强制 16:9、4:3、1:1 或 9:16（竖屏）。使用 FFmpeg.wasm scale 滤镜。
How It Works
使用 FFmpeg.wasm 的 scale 滤镜进行视频缩放。宽高比更改根据需要使用 pad 或 crop 滤镜。
Use Cases
- •调整 Instagram Reels 尺寸
- •将横屏转换为竖屏
- •将 4K 缩减到 1080p
- •调整电子邮件附件尺寸
- •裁剪用于演示文稿
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