How to Resize a Video for Reels, TikTok & YouTube
Every platform wants a different shape: vertical 9:16 for Reels and TikTok, square 1:1 for the feed, wide 16:9 for YouTube. The Video Resizer crops your video to the right aspect ratio in one click, in your browser, with no watermark.
The aspect ratios that matter
9:16 (vertical) is the standard for Reels, TikTok and Shorts and fills the whole phone screen. 1:1 (square) suits the Instagram feed. 4:5 (portrait) takes up more feed space than square. 16:9 (landscape) is classic YouTube. Posting the wrong ratio means black bars or awkward cropping by the platform.
How to resize a video
- Open the Video Resizer and add your clip. 2. Pick a preset — 9:16, 1:1, 4:5 or 16:9. 3. The tool scales and centre-crops to fill the frame. 4. Download the resized video. Processing is local, so your footage stays private.
Getting the framing right
Centre-cropping keeps the middle of the frame, so make sure your subject is centred. If important action is off to one side, trim to that moment first with the Video Trimmer. For vertical clips destined for Reels, pair this with the Reel & Shorts Caption Generator for captions that boost watch time.
Try the tool from this guide
Video Resizer
Crop video for Reels, TikTok, Shorts & square.
Open Video ResizerFrequently asked questions
How do I make a video vertical for Reels?
Open the Video Resizer, choose the 9:16 preset, and download — the tool crops your video to fill a vertical phone screen.
Which aspect ratio is best for TikTok?
9:16 (vertical) fills the screen and is the native ratio for TikTok, Reels and YouTube Shorts.
Will resizing add black bars?
No. The tool scales to fill and centre-crops the overflow, so there are no bars — just make sure your subject is centred.
Is my video uploaded?
No. Resizing runs in your browser, so the footage never leaves your device.
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