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CSS Aspect Ratio Generator
CSS Aspect Ratio Generator | Free Online Tool
Generate modern aspect-ratio CSS or legacy padding hacks to lock box proportions.
Update Ratio
Ratio Settings
Preset Ratios
16:9 (Widescreen Video)
4:3 (Standard Video)
1:1 (Square / Avatar)
21:9 (Ultrawide)
3:2 (Photography)
9:16 (Vertical Video)
Custom...
Custom Ratio (W / H)
/
Width (for visualizer)
Visualizer & CSS Output
Copy CSS
1:1
