YouTube Shorts Resizer
Shorts play in a vertical 9:16 feed at up to 1080x1920. Convert your footage to that exact frame here so YouTube does not letterbox it - the whole conversion runs in your browser with no watermark.
How to resize a video for YouTube Shorts
- 01Upload the video you want to publish as a Short.
- 02The 1080x1920 Shorts preset is preselected for you.
- 03Click Resize and upload the result straight to YouTube.
Shorts resizing features
Outputs the 1080x1920 vertical video Shorts are built around, so your clip fills the feed.
No upload queue, no server wait - encoding happens on your machine via WebAssembly.
No watermarks or overlays; the file you download is the file you publish.
Related free tools
Frequently asked questions
What is the YouTube Shorts size?+
The YouTube Shorts size is 1080x1920 pixels (9:16 vertical). This tool handles the frame, so trim the clip length first if needed.
Can I convert a landscape video to Shorts?+
Yes. The YouTube Shorts preset uses a 9:16 cover crop with an interactive preview; reposition the frame before exporting 1080x1920 without stretching the source.
Is the video uploaded to your server?+
No. Resizing happens entirely in your browser - the file never leaves your device.
How do I make a video fill the YouTube Shorts screen?+
Upload it, adjust the 9:16 crop preview, and export the 1080x1920 MP4. The preset crops to fill the frame instead of adding bars or stretching the video.
Related articles
How to Resize a Video Online
Learn how to resize a video online for 16:9, 9:16, square, or custom dimensions while keeping the aspect ratio for social posts and uploads.
YouTube Shorts Size: 1080x1920 Guide
Learn the YouTube Shorts size, why 1080x1920 and 9:16 matter, and how to resize and crop a video for full-screen vertical playback.