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CSS Flexbox Generator

Visually build CSS Flexbox layouts. Adjust properties and copy the generated CSS.

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CSS
.container {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: stretch;
  flex-wrap: nowrap;
  gap: 8px;
}

What Is the CSS Flexbox Generator?

The CSS Flexbox Generator is a visual tool for building Flexbox layouts without memorizing every property value. Adjust flex-direction, justify-content, align-items, flex-wrap, align-content, and gap using dropdowns and sliders. A live preview updates instantly so you can see exactly how your layout will behave, and the generated CSS is ready to copy into your stylesheet.

How to Use the CSS Flexbox Generator

  1. Use the dropdowns on the left to set Flexbox container properties.
  2. Drag the gap slider to adjust spacing between items.
  3. Drag the item count slider to add or remove preview boxes.
  4. Watch the live preview update in real time.
  5. Click Copy to copy the generated CSS to your clipboard.

Features

  • Visual live preview with colored flex items
  • Controls for all major container properties: flex-direction, justify-content, align-items, flex-wrap, align-content, gap
  • align-content control appears only when flex-wrap is enabled
  • Adjustable item count (1–8) to test wrapping behavior
  • Gap slider from 0 to 40px
  • One-click CSS copy to clipboard

FAQ

What is CSS Flexbox?

CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model that distributes space along a single axis — either a row or a column. It gives you control over alignment, ordering, and sizing of items inside a container without using floats or positioning hacks.

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

justify-content controls alignment along the main axis (the direction set by flex-direction). align-items controls alignment along the cross axis (perpendicular to the main axis). For a row layout, justify-content is horizontal and align-items is vertical.

When should I use align-content?

align-content only has an effect when flex-wrap is set to wrap or wrap-reverse and there are multiple lines of flex items. It controls how those lines are distributed along the cross axis.

What does gap do in Flexbox?

The gap property sets the spacing between flex items. It is shorthand for row-gap and column-gap. Unlike margin, gap only applies between items — not on the outer edges of the container.