CSS Aspect Ratio Generator
Generate CSS aspect-ratio values
🔒 Files never leave your browser
Enter Width
:
Calculated Heights
Preview
CSS Code
How to Use CSS Aspect Ratio Generator
Choose ratio
Select a preset or enter custom ratio.
Preview
See the box with your ratio applied.
Copy CSS
Copy the generated CSS code.
Why Choose AllTools CSS Aspect Ratio Generator?
- ✓ Common ratio presets
- ✓ Custom ratio input
- ✓ Live preview
- ✓ CSS output
- ✓ Responsive design
- ✓ No data stored
Why Use This Tool
- ★ Live preview as you adjust settings
- ★ Clean, production-ready CSS output
- ★ No account or sign-up required
- ★ Copy generated code with one click
- ★ Works on any device with a modern browser
Related Resources
Frequently Asked Questions
What is CSS aspect-ratio? ▼
The aspect-ratio CSS property sets a preferred aspect ratio for the box, which will be used in the calculation of auto sizes.
What preset ratios are included? ▼
16:9, 4:3, 1:1, 21:9, 3:2, and more. You can also enter any custom ratio.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.
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