Developer Utilities · Free tool
Flexbox Playground
Experiment with justify-content, align-items, and wrap and see live CSS updates. Free instant tool in your browser—no download.
Updated June 2026
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Children (3/8)
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CSS
.container {
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: stretch;
flex-wrap: nowrap;
gap: 12px;
}
.container > :nth-child(1) {
flex: 0 1 auto;
}
.container > :nth-child(2) {
flex: 0 1 auto;
}
.container > :nth-child(3) {
flex: 0 1 auto;
}Advertisement
What it does
Experiment with every common flexbox property — justify-content, align-items, flex-direction, flex-wrap, gap, and item sizing — with an interactive demo. As you change controls, the CSS rule builds live in the output panel.
For grid instead use grid layout generator. For visual polish, box shadow generator and border radius generator.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/flexbox-playground" width="100%" height="720" frameborder="0" loading="lazy" title="Flexbox Playground" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Toggle flex-direction, justify-content, align-items.
- Change item count and per-item flex basis.
- Watch the live preview update.
- Copy the generated parent + child CSS.
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Learn more
Guides about this topic
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