WaffleFrameAspect ratios explained for beginners
An aspect ratio is simply width compared to height. 16:9 means 16 units wide for every 9 units tall — the standard for laptops, TVs and normal YouTube videos, usually 1920×1080 pixels. 9:16 is the same shape turned on its side: 9 wide, 16 tall, or 1080×1920 pixels.
Because the shapes are so different, you can't just "resize" a 16:9 video into 9:16 without either stretching it (which looks wrong), cropping the sides, or adding something above and below. This tool gives you three clean ways to do it instead of stretching.
Three ways to go from 16:9 to 9:16
- Blurred background — the full 16:9 frame sits in the middle; the empty space becomes a blurred copy. Nothing is lost.
- Fill — a 9:16 slice is cut from the middle (or wherever you drag it). Full-screen, but the sides are gone.
- Zoom — a compromise: a wider slice, enlarged, over a blurred background.
Other common ratios: 1:1 (square, Instagram feed), 4:5 (Instagram portrait posts) and 4:3 (older cameras). Need a format change instead of a shape change? Try the Video Converter.
Recommended vertical video sizes per platform
| Platform | Aspect ratio | Resolution | Max length |
|---|---|---|---|
| YouTube Shorts | 9:16 | 1080×1920 | up to 3 minutes |
| TikTok | 9:16 | 1080×1920 | up to 10 minutes (upload) |
| Instagram Reels | 9:16 | 1080×1920 | up to 3 minutes |
| Facebook Reels | 9:16 | 1080×1920 | up to 90 seconds |
| Snapchat Spotlight | 9:16 | 1080×1920 | up to 60 seconds |
Platform limits change regularly — check the platform's help center for the latest values.
Who is this for?
YouTubers
Turn your best long-form moments into Shorts to reach new viewers.
Podcasters
Convert video podcast clips into vertical highlights for TikTok and Reels.
Gamers
Keep the full gameplay visible with a blurred background.
ASMR & satisfying creators
Zoom in on the action so every detail fills the screen.
Tips for best results
- Keep important text and faces in the center — platform buttons cover the bottom and right side of vertical videos.
- Use Fill only when the action stays in one area; otherwise use Zoom.
- Export at 1080×1920 — lower resolutions look blurry on modern phones.
- Shorter is better: clips of 15–30 seconds often get more replays.
- Add a title overlay in the first second so viewers know what they're watching.
- Don't upload the same clip to every platform at the exact same time; spread your posts.
Frequently asked questions
What is the difference between 16:9 and 9:16?
Both describe the same proportions, rotated. 16:9 is landscape: wider than tall, like a TV or YouTube video at 1920×1080. 9:16 is portrait: taller than wide, like a phone held upright at 1080×1920. Shorts, TikTok and Reels all use 9:16, while regular YouTube videos use 16:9.
Can I change 16:9 to 9:16 without stretching the video?
Yes, and you should — stretched video makes people look thin and tall. This tool never stretches. It either keeps the full frame over a blurred background, crops a vertical slice, or zooms in partially. All three keep the original proportions of people and objects correct.
What resolution is 9:16?
9:16 can be any size with those proportions, but the standard for social media is 1080×1920 pixels (Full HD vertical). Some cameras record 2160×3840 (4K vertical). This converter always exports 1080×1920, which is what Shorts, TikTok and Reels recommend and display at full quality.
Do I need editing software to change the aspect ratio?
No. Editing apps can do it, but they take time to learn. Here you drop your video into the page, pick a style and export. It all happens in your web browser — no installation, no account needed until you export, and your video is never uploaded to a server.
