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Aspect Ratio Box Generator
Generate aspect-ratio CSS plus the padding-bottom fallback snippet. Copy a ready-to-use responsive wrapper for any width and height.
How to use this tool
- Enter custom width and height ratio values or apply a preset.
- Choose output mode for modern CSS, fallback, or combined support.
- Copy CSS/HTML/Tailwind snippets or download the generated stylesheet.
Why this pattern
- The generated CSS supports modern `aspect-ratio` and optional legacy fallback.
- Useful for media placeholders, cards, embeds, and image containers.
- Preview panel lets you validate ratio behavior before implementation.
Implementation tips
- Use semantic class names that match your component naming conventions.
- Prefer combined mode when supporting older browsers is a requirement.
- Keep ratio tokens consistent across design system components.
FAQ
- Do I still need padding-bottom hacks?
- Only for older browser support; modern engines handle `aspect-ratio` directly.
- Can I use non-integer ratios?
- Yes. Decimal width and height inputs are supported.
- Does the tool include Tailwind output?
- Yes. It generates an `aspect-[w/h]` snippet for quick utility usage.
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