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CSS Nesting Lab - Free Online CSS Tool | IconVault

Play with native CSS nesting and the & parent selector with live previews. Free, no signup, runs in your browser.

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CSS Nesting Lab

Experiment with native CSS nesting

5 of 5 free uses left
Browser support:This browser needs the flattened outputNative CSS nesting ships in Chrome 112+, Edge 112+, Safari 16.5+ and Firefox 117+ (2023). The flattened output below works everywhere, no build step needed.

Nested CSS input

5 of 5 free flattens left.

Handles &, nested selectors, comma lists and nested at-rules like @media. For exotic cases (nesting inside @supports conditions, @scope) use a real preprocessor.

Flattened output

.lab-card:hover {
  border-color: #0f766e;
  box-shadow: 0 12px 32px rgba(15, 118, 110, 0.12);
}

.lab-card .lab-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 800;
}

.lab-card .lab-text {
  margin: 0 0 16px;
  color: #64748b;
  font-size: 14px;
  line-height: 1.6;
}

.lab-card .lab-btn:hover {
  background: #0d5f59;
}

.lab-card .lab-btn {
  background: #0f766e;
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 10px 22px;
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 480px) {
.lab-card .lab-title {
  font-size: 17px;
}
.lab-card {
  padding: 16px;
}
}

.lab-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 24px;
  max-width: 420px;
}

Live preview

Card title

This sample card is styled by your flattened CSS, live. Hover it, resize the window, and edit the input to see changes instantly.

About this tool

IconVault's CSS Nesting Lab is a playground for native CSS nesting: write nested rules with the & parent selector, nest pseudo-classes, pseudo-elements, media queries and combinators, and see the flattened result update live. No Sass or build step needed.

Nesting is now part of the CSS language itself, so the patterns you learned in preprocessors work in the browser directly. Try & :hover, &:not(), nested @media and @supports blocks. Free and runs fully in your browser.

Frequently asked questions

Popular searches

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