Fill the frame with
Left ← → right
Output size
Shorts can be up to 3 minutes
Next stepThumbnail & title previewSee your video in a real-looking feed
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Start a videoHow to use the shorts resizer (9:16)
- Choose a horizontal videoAny 16:9 clip works, from a long video or a stream.
- Pick how to fill 9:16Blurred background keeps everything visible. Crop zooms in on the action.
- Download the vertical MP4Upload it as a Short, TikTok or Reel.
Questions
What size is a YouTube Short?
1080×1920 pixels (9:16), up to 3 minutes long.
Which fill looks best?
Blurred background works for talking heads and screen recordings. Crop works when the action stays in the middle of the frame.
Is it free and without a watermark?
Yes. No watermark and no account.
Is my video uploaded?
No. It is processed in your browser on your own computer.