Resize Video
Scale a video to new dimensions. Leave width or height blank to preserve the aspect ratio.
About Resize Video
Resize Video scales a clip to new dimensions and exports an MP4; leave either width or height blank and it preserves the original aspect ratio automatically. Use it to downscale heavy footage, hit a platform's required resolution, or shrink a file before sharing. The scaling runs in your browser, so your video is processed on your device with no upload.
- Category
- media
- Input
- Accepts: video/*.
- Output
- Outputs: video/mp4.
- Cost
- Free, runs in your browser
- Memory
- high
- Install group
- ffmpeg
Common uses
- Downscale 4K footage to 1080p to cut the file size before emailing or uploading
- Resize a clip to a platform's required resolution for a clean upload
- Shrink a screen recording so it fits within an attachment size limit
- Scale footage down to speed up later in-browser steps like color correction or overlays
- Set just the width and let height follow automatically to keep the aspect ratio intact
- Produce a smaller preview version of a high-resolution clip for quick review
Frequently asked questions
How do I keep the aspect ratio?
Leave either width or height blank. The tool fills in the missing dimension proportionally so the video isn't stretched or squashed.
Can I upscale to a larger size?
You can set larger dimensions, but enlarging can't add detail that isn't in the source, so the result will look softer. Downscaling is where resizing shines.
What formats does it accept and produce?
It accepts common video files (any video/* type such as MP4, MOV, or WebM) and always outputs MP4.
Is my video uploaded to be resized?
No. Scaling happens entirely in your browser on your machine, so the footage never leaves your device.
Will resizing reduce the file size?
Usually yes — fewer pixels per frame typically means a smaller file, especially when downscaling, though the exact size depends on the content and length.
Keywords
- video
- resize
- scale
- dimensions
- width
- height
- shrink
- downscale