⬜ Resize to Fit in Box

Scale video to fit inside custom bounding box (adds letterbox/pillarbox)

Drag & drop video file here or click to browse

Upload a video to resize.
Enter target dimensions
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How to resize to fit in a box

  1. Upload a video (MP4, MOV, WebM, etc.).
  2. Enter the desired bounding box width and height (pixels).
  3. The video will be scaled to fit inside while preserving aspect ratio, with black bars added if needed.
  4. Open the Setting panel to adjust output quality, frame rate, and format.
  5. Click "Resize & Download" – the video will be re‑encoded and downloaded.

Privacy: All processing is local. Your video never leaves your device.