What aspect ratio should I use for Reels, Shorts and TikTok?
Use 9:16 vertical for all three. A 1080×1920 frame fills the phone screen on Instagram Reels, YouTube Shorts and TikTok, so one export can go everywhere. YouTube also classifies square (1:1) uploads up to 3 minutes as Shorts, but a horizontal 16:9 upload becomes a regular video. Whatever the ratio, keep captions and key details away from the bottom and right edges, where each app lays its caption, username and buttons over the video.
- YouTube treats uploads up to 3 minutes long with a square or vertical aspect ratio as Shorts.
- A 9:16 frame at 1080×1920 pixels fills a phone screen held upright.
- Veedio renders in 9:16, 1:1 or 16:9; 9:16 is the default for Shorts, TikTok and Reels.
- Veedio can publish one 9:16 render to TikTok, Instagram Reels and YouTube Shorts from the app.
Aspect ratio by platform
| Platform | Use | Also accepted | What to watch |
|---|---|---|---|
| YouTube Shorts | 9:16 vertical | 1:1 square, still classified as a Short | Over 3 minutes or horizontal, and it is a regular video instead |
| TikTok | 9:16 vertical | Other ratios play with bars around them | Caption, sounds and buttons sit over the bottom and right |
| Instagram Reels | 9:16 vertical | Other ratios are shown with bars or cropped | The profile grid shows a cropped preview; keep the subject centred |
| Facebook Reels | 9:16 vertical | As Instagram | Same overlay areas as Instagram |
| YouTube long-form, website, presentation | 16:9 landscape | Vertical plays with side bars | Not a Short; use it for long videos and embeds |
Why one vertical file is enough
All three short-video feeds are built for a phone held upright, so a 9:16 video fills the screen with no bars. 1080 pixels wide by 1920 tall is the standard full-HD vertical frame and the safe default for export. Make the video once at that size and you can post the same file to Reels, Shorts and TikTok, adjusting only the caption and the platform's settings.
Square video is the fallback when the same file also has to sit in a feed post or on a website. It counts as a Short on YouTube, but on TikTok and Reels it shows with empty space above and below, which looks smaller on the screen. Landscape is for long-form YouTube, embeds and presentations; on short-video feeds it becomes a strip across the middle of the screen.
Keep text out of the overlay zones
- Bottom area: every app puts the caption, username and sound or music label here. Keep your own captions above it.
- Right edge: like, comment, share and profile buttons run down the right side. Do not put names, prices or key details there.
- Top edge: the app's own tabs and search sit at the top on some screens. Leave a little margin.
- Centre: put faces, products and the main action in the middle of the frame, which is also what survives grid crops.
- Captions: centred, mid-to-lower third, large and high contrast. Bold, Boxed and Highlight caption styles stay readable over busy pictures.
Choosing Veedio's aspect ratio
| Aspect ratio | Choose it for | Notes |
|---|---|---|
| 9:16 (vertical) | YouTube Shorts, TikTok, Instagram and Facebook Reels, WhatsApp Status | The default; one render covers every short-video feed |
| 1:1 (square) | Feed posts, LinkedIn, ads that run in feeds, websites | Still a Short on YouTube if 3 minutes or less |
| 16:9 (landscape) | YouTube long-form, website headers, presentations, training | Not classified as a Short on YouTube |
Turning a landscape idea into a vertical video
- 1
Rethink the shot, not just the crop
Landscape frames spread action sideways. For vertical, describe scenes with one subject, centred, with height: a person standing, a tall building, a product held up close.
- 2
Write prompts for a tall frame
Add 'vertical composition, subject centred' or 'close-up' to scene descriptions so generated pictures do not leave the subject at the edge.
- 3
Render at 9:16
In Veedio, choose 9:16 before generating so every scene is drawn for the vertical frame rather than cropped from a wide one.
- 4
Check the overlay zones
Watch the finished video on a phone inside the app's preview. Move or shorten anything hidden under captions or buttons.
- 5
Export once, post everywhere
Publish the same file to TikTok, Reels and Shorts, writing a platform-specific caption for each and setting each platform's AI and audience options.
Aspect ratio mistakes
- Uploading a 16:9 video to YouTube expecting it to appear in the Shorts feed.
- Cropping a landscape video to vertical so the subject's head or the product falls off the side.
- Putting captions at the very bottom, where the app's own caption covers them.
- Re-uploading a downloaded TikTok, with its watermark, to Reels or Shorts instead of the original file.
- Adding blurred bars to a landscape video and calling it vertical: it reads as a reused clip.
FAQ
Questions people ask next
Is 9:16 the same as 1080×1920?
9:16 is the shape; 1080×1920 is one size in that shape, the standard full-HD vertical frame. 720×1280 is also 9:16 but lower resolution.
Can YouTube Shorts be square?
Yes. YouTube classifies square and vertical uploads of up to 3 minutes as Shorts. Vertical fills more of the screen, so it is usually the better choice.
What happens if I upload a horizontal video as a Short?
YouTube treats it as a regular video, not a Short, so it will not be shown in the Shorts feed as one.
Is 4:5 good for Reels?
A 4:5 video works in an Instagram feed post but does not fill the screen as a Reel. For Reels, use 9:16 and keep the subject centred so the grid preview still looks right.
Can I use one video for TikTok, Reels and Shorts?
Yes. A 9:16 file works on all three. Post the original file to each rather than a downloaded copy with another app's watermark, and disclose AI on each platform separately where needed.
Which aspect ratio is best for ads?
For TikTok, Reels and Stories placements, 9:16. For feed placements across platforms, square is a common choice. Check each ad platform's specifications for the placement you are buying.
Sources, checked 30 October 2026:
Platforms change their rules, so check them before you rely on them.
Keep going
Related
- Do you have to label AI videos on TikTok?
- How long should a TikTok video be?
- How often should I post YouTube Shorts?
- What AI is used to make AI animal videos?
- What AI is used to make AI cartoon videos?
- What AI is used to make Reddit story videos?
- What is a faceless YouTube channel?
- How do you post one video to TikTok, Instagram Reels and YouTube Shorts at the same time?
- How do you make AI videos for TikTok?
- How do you make faceless TikTok videos with AI?