FormatShiftSocial Media Image Sizes: Complete Cheat Sheet
Social networks have strict resolution and aspect ratio guidelines. Uploading incorrect dimensions results in awkward cropping and aggressive compression artifacts.
Universal Dimensions Cheat Sheet
| Placement | Resolution | Ratio |
|---|---|---|
| Square Post | 1080 × 1080 px | 1:1 |
| Stories & Reels | 1080 × 1920 px | 9:16 |
| Banner / Header | 1920 × 768 px | 16:9 / 2.5:1 |
| Avatar | 800 × 800 px | 1:1 |
Optimize Images Before Posting
Compress photos or convert to WebP/JPG locally in browser memory.
Frequently Asked Questions
What is the standard post image ratio?
Standard square posts use 1080x1080px (1:1), while stories and reels use 1080x1920px (9:16).
Why do social networks compress photos?
To speed up feed loading, platforms compress images above 1-2 MB. Compressing them beforehand prevents blurry artifacts.