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About

Change video aspect ratio in your browser

Convert horizontal videos to vertical, or vice versa, by adding letterboxing or cropping. Since all processing happens in your browser, your files never leave your device.

How to use Change Aspect Ratio

  1. Choose a video.
  2. Select a target aspect ratio and whether to crop or letterbox.
  3. Click Change Aspect Ratio and download the result.
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Frequently Asked Questions

What is the difference between Letterbox and Crop?
Letterboxing adds black bars to the sides or top and bottom so the entire original frame remains visible. Cropping fills the whole screen by cutting off parts of the original video.
Accepted formats: MP4, WEBM, MOV, MKV