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CSS Flexbox Generator

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Experiment with CSS flexbox visually — adjust every container property and copy the generated CSS.

Items: 5

1 to 12 items.

Preview

CSS

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How to use Flexbox Generator

  1. Pick a flex-direction and flex-wrap for the container.
  2. Adjust justify-content, align-items, align-content, and the gap.
  3. Use Add item and Remove item to set how many boxes appear in the preview.
  4. Copy the generated container CSS and paste it into your project.

What is Flexbox Generator?

This tool is a hands-on playground for the CSS flexible box layout. Turning a container into a flex context with display: flex unlocks powerful one-dimensional alignment, and this generator lets you preview every container property at once instead of guessing.

Change the main-axis direction, control wrapping, distribute items with justify-content, align them on the cross axis with align-items, and add spacing with gap. Add or remove numbered boxes to see how real items respond, then copy the finished CSS straight into your stylesheet. Everything runs locally in your browser.

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FAQ

What is the difference between justify-content and align-items?
justify-content distributes items along the main axis (the direction set by flex-direction), while align-items positions them on the perpendicular cross axis. Switching flex-direction between row and column effectively swaps which axis each one controls.
Why does align-content have no visible effect sometimes?
align-content only applies when items wrap onto multiple lines. Set flex-wrap to wrap and add enough items that they break onto a second row before changing align-content to see it work.

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