CSS Aspect Ratio Generator

Reduce dimensions to a ratio, show the decimal ratio, and copy the CSS property.

Width

Height

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Runs locally in your browser. Generated CSS is not deployed or tested against your site automatically.

Production CSS handoff

Review the CSS you will actually ship

This panel stays locked until you review the generated output above. It checks output shape, feature dependencies, motion/fallback concerns and creates a copy-ready component handoff.

Waiting for generated CSS

Output shapeLocked

Declarations—

UTF-8 bytes—

Browser preflightGenerate first

Features detected

Production findings

Copy-ready handoff

Generated component handoff will appear here.

Browser support is checked against the browser running this page, not every browser you support. Treat this as a production preflight, then test the copied CSS in your real component, content, cascade and target browser matrix.

Intrinsic-ratio & fallback handoff

Reduce width/height to a canonical ratio and expose intrinsic sizing evidence. This is a sizing workflow, not a crop-position workflow.

Fallback target

—Reduced ratio

—Orientation

—Legacy padding

—Intrinsic pair

Ready.

Output	Value	Why it matters	Ship check

What this CSS result proves

Generated CSS should be judged by the real output, not just the controls.

What to review before production

Copy the output into the actual component, test its layout/content extremes, and review browser support, fallbacks and accessibility before production use.