Aspect ratio picker
Ratio is fixed at generation time. Choosing it wrong is the most common way to pay twice for the same image — five seconds here avoids that.
Last reviewed
Aspect ratio picker
Pick where the output is going and set that ratio before you generate — re-cropping afterwards costs another render.
- Set ratio to
- 9:16
- Export at
- 1080 × 1920
Keep captions inside the middle 80% — the UI covers the edges.
Reference
Every preset in one table
The same data as the picker, for when you want to scan rather than select.
| Destination | Type | Ratio | Export size | Watch out for |
|---|---|---|---|---|
| Instagram Reels | Video | 9:16 | 1080 × 1920 | Keep captions inside the middle 80% — the UI covers the edges. |
| TikTok | Video | 9:16 | 1080 × 1920 | Bottom 20% is covered by the caption and CTA stack. |
| YouTube Shorts | Video | 9:16 | 1080 × 1920 | Upload at 60s or under to stay in the Shorts shelf. |
| YouTube (landscape) | Video | 16:9 | 1920 × 1080 | The default for anything embedded on a website. |
| Instagram feed post | Image | 4:5 | 1080 × 1350 | 4:5 takes the most vertical space allowed in feed. |
| Instagram square | Image | 1:1 | 1080 × 1080 | Safest crop when the same asset goes to several networks. |
| X / Twitter image | Image | 16:9 | 1600 × 900 | Anything taller gets centre-cropped in timeline preview. |
| Pinterest pin | Image | 2:3 | 1000 × 1500 | 2:3 is the ratio Pinterest actively recommends. |
| Facebook feed ad | Image | 1:1 | 1080 × 1080 | Keep text light — heavy text overlays suppress delivery. |
| Print poster (A-series) | Image | 2:3 | 2480 × 3508 | Generate at the largest size available, then upscale. |
| Website hero banner | Image | 16:9 | 1920 × 1080 | Compose with empty space on one side for headline text. |
| YouTube thumbnail | Image | 16:9 | 1280 × 720 | Faces and 3–4 large words read best at shelf size. |
Safe areas are not the same as the frame
On vertical video especially, the platform UI covers the bottom fifth of your clip with captions and buttons. Compose the important content inside the middle of the frame — the ratio being correct does not mean everything in it will be visible.
FAQ
Aspect ratio questions
Why does the aspect ratio have to be set before generating?
Because it is baked into the render. Changing it afterwards means generating again and paying again — unlike most settings, this one cannot be adjusted after the fact.
Can I just crop afterwards instead?
You can, and you lose both resolution and composition. The model composes for the frame it is given, so a 16:9 render cropped to 9:16 usually cuts through the subject rather than around it.
What if the same asset goes to several platforms?
Generate at 1:1 and crop outward, or generate the vertical version and accept letterboxing elsewhere. Square is the safest single choice when you genuinely cannot generate twice.
Does aspect ratio affect the credit cost?
Not directly — cost is driven by model choice. It affects cost indirectly and severely, because the wrong ratio means paying for the whole render twice.
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Keep reading
Platform specifications change. Dreamina Hub reviews these presets periodically — last checked 2026-08-13.