Video Resizer
Scale your video to modern resolutions (4K, 1440p, 540p, Reels, Stories), percent scaling, and quality/size control — all processed locally.
Drop files here or click to browse
Your files never leave this device
How to use the Video Resizer
- Upload a video
- Pick a size mode, preset, format and quality
- Click Resize Video — first run downloads the ~30 MB engine
- Download the resized video
Features
- ✅ Presets: 4K, 1440p, 1080p, 720p, 540p, 480p, 360p
- ✅ Social presets: Reel 9:16, Story, Square, 4:5
- ✅ Percent scaling and custom width
- ✅ MP4 (H.264) or WebM (VP9) output
- ✅ Quality selector with size control
- ✅ Easy “Another video” reset button
FAQ
Is quality lost?
You control it with the quality selector (Best / Balanced / Smaller file) — it maps to the codec's CRF.
Why does the first run take a moment?
The tool runs ffmpeg (ffmpeg.wasm) locally for real encoding; the ~25 MB engine is bundled with the site, loads once into memory, then everything stays in your browser.