Add cinematic letterbox

Add adjustable top and bottom bars for a cinematic widescreen look.

Choose or drop a videoMP4, MOV, WebM, MKV and browser-decodable formats

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Guide and FAQ

How to use Add cinematic letterbox

  1. 1. Choose or drop a video
  2. 2. Preview and adjust settings
  3. 3. Process locally and inspect the result
  4. 4. Download to this device
Files stay on this device
Adjustable settings with preview
No account required

FAQ

Are files uploaded?

No. Processing runs locally in browsers that support WebCodecs.

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