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CSS flexbox generator

Build flexbox layouts visually. Adjust direction, wrapping, alignment, and gap in real-time, then copy production-ready CSS and HTML.

8px
4
1
2
3
4
css
display: flex;
flex-direction: row;
flex-wrap: nowrap;
justify-content: flex-start;
align-items: stretch;
gap: 8px;
html
<div class="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
</div>

What is CSS Flexbox Generator?

A CSS Flexbox generator is a visual tool for building flexible box layouts without memorizing property combinations. Flexbox is a one-dimensional CSS layout model that distributes space between items in a container along a main axis and cross axis. This tool lets you configure all flex container properties — direction, wrapping, alignment, justification, and gap — with a live preview showing exactly how items arrange. You also control child item properties like flex-grow, shrink, and order. The output is production-ready CSS or Tailwind utility classes.

How to Use CSS Flexbox Generator

  1. 1

    Set container properties

    Choose flex-direction (row/column), flex-wrap, justify-content, and align-items. Adjust the gap between items. The live preview updates instantly.

  2. 2

    Configure child items

    Add or remove child items. Set individual flex-grow, flex-shrink, flex-basis, and order values for each item to control sizing and sequencing.

  3. 3

    Copy the code

    Click "Copy CSS" for the container and item styles, or "Copy Tailwind" for utility classes. Paste directly into your project.

Features

  • All flex container properties: direction, wrap, justify, align, gap
  • Individual child item controls: grow, shrink, basis, order
  • Live visual preview with configurable item count
  • CSS and Tailwind CSS output formats
  • Copy to clipboard with one click
  • Responsive-friendly layout generation
  • Visual alignment guides and labels
  • 100% client-side — no server calls needed

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Frequently Asked Questions

What is CSS Flexbox?+
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model for distributing space among items in a container. It excels at aligning items horizontally or vertically, distributing extra space, and handling dynamic content sizes. It replaced many float and table-based layout hacks.
When should I use Flexbox vs Grid?+
Use Flexbox for one-dimensional layouts — a single row or column of items. Use CSS Grid for two-dimensional layouts where you need control over both rows and columns simultaneously. Flexbox is ideal for navigation bars, card rows, centering content, and form layouts.
What is the difference between justify-content and align-items?+
justify-content controls spacing along the main axis (horizontal in row direction, vertical in column). align-items controls alignment along the cross axis (perpendicular to main). Together they give you full 2D positioning control within the flex container.
What does flex: 1 mean?+
flex: 1 is shorthand for flex-grow: 1, flex-shrink: 1, flex-basis: 0%. It makes an item grow to fill available space equally with other flex: 1 siblings. Two items with flex: 1 each take 50% of the container width.
Is Flexbox supported in all browsers?+
Yes, Flexbox is supported in all modern browsers including Chrome, Firefox, Safari, Edge, and mobile browsers. No vendor prefixes are needed. It has been universally supported since 2015.
How do I center an element with Flexbox?+
Set the parent to display: flex, then use justify-content: center and align-items: center. This centers the child both horizontally and vertically — the most reliable centering method in CSS.