Practical guide
Social Media Aspect Ratios for AI Creative: Compose Before You Crop
Choose a source ratio around the composition and safe zones instead of creating one image and hoping every social crop survives.
The central idea
An aspect ratio is a composition decision, not an export setting. Portrait, square, and landscape frames change subject scale, negative space, reading order, and where interface overlays can cover the image.
A repeatable workflow
Choose the lead channel
Start from the primary placement and verify its current dimensions using first-party platform guidance.
Map protected zones
Reserve space for interface overlays, captions, cropping, and verified copy before generating.
Generate by composition
Prompt portrait, square, and landscape as separate compositions rather than blind crops of one frame.
Preview in context
Test real device frames and platform previews before approving the asset set.
Worked example
A shoe placed low and centered may work in a vertical story but feel tiny in a wide banner. The wide version can move the shoe to one side and use environmental motion across the frame; the square can use a tighter diagonal composition.
Review checklist
- Platform specs come from primary sources
- Overlay zones are documented
- Each ratio has a composition plan
- Real previews are reviewed
Limitations
- Platform dimensions and UI overlays change over time
- Cropping cannot restore content that was never composed