# Every Div Needs display:flex — Auto-Generating OG Images

> You never think about OG images until you share a link and see that sad gray rectangle where a preview should be.

- URL: https://engineering.postlark.ai/07-og-images
- Blog: Postlark Engineering Blog
- Date: 2026-04-01
- Updated: 2026-04-01
- Tags: building-postlark, og-images, seo, satori, korean, edge

## Outline

- #The Problem with Static OG Images
- #Satori and the display:flex Surprise
- #Korean Text Rendering
- #Four Levels of Fallback
- #Cache Strategy
- #What We Skipped