Resize a video
Change the resolution of a video without squashing or stretching the picture. Use a standard size or enter exact pixel dimensions.
How to resize a video
- Add your video above.
- Choose a size. For a vertical phone video, 720p means 720 × 1280.
- Choose Keep shape to fit the video inside that size, or Exact size, add bars when a platform demands exact dimensions.
- Press Resize video and download the result.
Keep shape or exact size?
Every video has an aspect ratio, the relationship between its width and height. Most cameras record 16:9; phones held upright record 9:16. If the size you ask for has a different ratio, the tool has two honest options and never a third, distorting one:
- Keep shape scales the video until it fits inside the box. A 4:3 video resized to 1280 × 720 comes out 960 × 720.
- Exact size, add bars does the same and then pads the remaining space with black, so the file is exactly 1280 × 720.
If you want to fill the frame and lose the edges instead, use the cropper first.
Resizing up and down
Making a video smaller is the most reliable way to reduce its file size and makes it play smoothly on older devices. Making a video larger is possible with a custom size, but it cannot add detail that was never recorded. An upscaled video looks soft, just bigger. Dimensions are always rounded to even numbers, which H.264 requires.
Questions about Resize video
Will resizing stretch my video?
No. The aspect ratio is preserved in both modes. “Exact size” adds black bars rather than distorting the picture.
What does 720p mean for a vertical video?
The tool detects vertical videos and uses the vertical version of each size, so 720p becomes 720 pixels wide and 1280 tall.
Does resizing reduce file size?
Usually, yes. Fewer pixels need fewer bits. For the smallest file, use the compressor, which combines a lower resolution with stronger compression.
Can I resize to 4K?
Not at the moment. Output is limited to 1920 pixels on either side to keep processing times reasonable on our servers.