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Flexbox Playground
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Flexbox Playground

Interactive Flexbox layout builder. Tune direction, wrap, justify-content, and align-items on a live demo and copy the generated CSS.

Works Offline100% Free

Processed 100% locally in your browserPrivate & Safe

Flexbox Playground runs entirely on your device using Web API standards. No data is ever uploaded to UtilixVerse servers.

Your Input
➔
Browser
➔
Result
No Server UploadsNo Account RequiredWorks OfflineZero Data Logging
Live Flexboxrow · center · center
1
2
3
4
5
6
12px
6
0
1
90px

Tip: set flex-wrap: nowrap + flex-grow: 1 to build equal-width columns.

CSS Output

style.css
/* Generated with UtilixVerse Flexbox Playground */
.flex-container {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  align-content: center;
  gap: 12px;
}

.flex-item {
  flex: 0 1 90px;
}

Flexbox Playground — Interactive Flex Layout Builder

Master CSS Flexbox with the UtilixVerse interactive playground. Toggleflex-direction, flex-wrap, justify-content,align-items, align-content, and gap on a live container, then fine-tune children with flex-grow, flex-shrink, andflex-basis. Copy the generated flex layout CSS straight into your project.

Why play with Flexbox visually?

Flexbox concepts like main axis, cross axis, and the flex shorthand are easiest to learn by seeing them move. Watch items reflow as you flip flex-direction: column, seespace-between spread children to the edges, and understand whyflex-wrap matters on narrow screens — all before writing a single line of CSS by hand.

Free, offline, and private. Explore theCSS Animation Generator to bring your flex layouts to life.

Flexbox Playground FAQ

Common questions about building Flexbox layouts interactively.

How do I use the Flexbox playground?

Choose a flex-direction, wrap behavior, and the number of children, then experiment with justify-content, align-items, align-content, and gap. Sliders for flex-grow, flex-shrink, and flex-basis let you control how children size themselves. The live container previews every change and generates the corresponding CSS.

What is the difference between justify-content and align-items?

justify-content distributes children along the main axis (the flex-direction), while align-items positions them along the cross axis. In a row layout, justify-content works horizontally and align-items vertically — flip flex-direction to column and the axes swap. Try both dropdowns in the playground to see it visually.

What do flex-grow, flex-shrink, and flex-basis do?

flex-basis sets the starting size of an item, flex-grow controls how it expands to fill extra space, and flex-shrink controls how it shrinks when space is tight. The shorthand "flex: 1 1 auto" means "grow equally, shrink equally, base on content". Our playground generates the shorthand for you.

When should I use Flexbox instead of CSS Grid?

Use Flexbox for one-dimensional layouts — a single row or column, like a navbar, button group, or centered hero. Use CSS Grid for two-dimensional layouts where you control rows and columns simultaneously. For everything in between, the two compose beautifully — our CSS Grid Playground pairs well with this tool.

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