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Flexbox Playground & CSS Generator

Experiment with flexbox layouts in real time. Adjust direction, wrapping, alignment, and gaps visually, then copy clean CSS for your own UI layouts.

Direction & wrapping

Flex directionHorizontal left-to-right layout.
Flex wrapItems wrap onto new lines in order.

Alignment

Justify contentCenter items on the main axis.
Align itemsStretch items to fill the cross axis.
Align contentStretch lines to take up remaining space.

Gaps

Gap
16px

Preview setup

Items
6
Container height
260px

Live preview

6 items · 16px gap
Item 1
Item 2
Item 3
Item 4
Item 5
Item 6

Generated CSS

display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: stretch;
align-content: stretch;
gap: 16px;

How to use this tool

  1. Set flex direction, wrapping, and alignment options in the control panel.
  2. Adjust uniform or independent row/column gaps and preview item distribution.
  3. Copy generated CSS and apply it to your layout container.

What you can test

  • Main-axis and cross-axis alignment combinations.
  • Wrapping behavior with different item counts and container heights.
  • Gap strategies for consistent spacing systems.

Implementation tips

  • Use `align-content` only when wrapping is enabled and multiple lines exist.
  • Prefer semantic utility classes for recurring flex patterns in your codebase.
  • Verify behavior with variable content lengths before shipping.

FAQ

Why is align-content disabled sometimes?
It only affects multi-line flex containers, so it has no effect when `flex-wrap` is `nowrap`.
Can I control row-gap and column-gap separately?
Yes. Toggle independent gaps to set row and column spacing separately.
Is the exported CSS production-ready?
Yes. The generated declarations are standard CSS and can be pasted directly into your styles.

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