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: June 2026
OptiPix Video Resizer changes video dimensions, resolution, and aspect ratio directly in your browser. Choose from standard resolutions (1080p, 720p, 480p) or custom sizes. Social media presets for Instagram Reels, TikTok, YouTube, and more. Aspect ratio options: keep original, force 16:9, 4:3, 1:1, or 9:16 for vertical. Uses FFmpeg.wasm scale filter.
How It Works
FFmpeg.wasm -vf scale filter resizes the video. Aspect ratio changes use pad or crop filters as needed.
Use Cases
- •Resize for Instagram Reels
- •Convert landscape to portrait
- •Downscale 4K to 1080p
- •Resize for email attachment
- •Crop for presentation
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If you find Video Resizer useful, check out these related tools: Video Trimmer, Video Rotator, and Video to MP4 Converter. All tools run entirely in your browser with no uploads or signups required.
Explore more: Browse all tools · Step-by-step guides · Tips & tutorials · Compare tools
Frequently Asked Questions
Social media presets?
Custom sizes?
Quality?
Uploaded?
Aspect ratio?
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