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 mění rozměry, rozlišení a poměr stran videa přímo ve vašem prohlížeči. Vyberte si ze standardních rozlišení (1080p, 720p, 480p) nebo vlastních velikostí. Předvolby pro sociální sítě pro Instagram Reels, TikTok, YouTube a další. Možnosti poměru stran: zachovat původní, vynutit 16:9, 4:3, 1:1 nebo 9:16 pro vertikální. Používá filtr FFmpeg.wasm scale.
How It Works
Filtr FFmpeg.wasm -vf scale mění velikost videa. Změny poměru stran používají podle potřeby filtry pad nebo crop.
Use Cases
- •Změnit velikost pro Instagram Reels
- •Převést z krajiny na portrét
- •Zmenšit 4K na 1080p
- •Změnit velikost pro přílohu e-mailu
- •Oříznout pro prezentaci
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