CSS Flexbox Generator

CSS Flexbox Generator

Build Flexbox layouts visually and copy the generated CSS

Controls

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Generated CSS

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

What is Flexbox?

CSS Flexbox (Flexible Box Layout Module) is a layout model introduced in CSS3 that provides a more efficient way to lay out, align, and distribute space among items in a container, even when their size is unknown or dynamic. Unlike traditional layout methods using floats and positioning, Flexbox is direction-agnostic and designed for one-dimensional layouts.

Flexbox works along two axes: the main axis (defined by flex-direction) and the cross axis (perpendicular to it). Properties like justify-content control distribution along the main axis, while align-items and align-content control the cross axis. This tool lets you experiment with all these properties visually and copy the resulting CSS.

Flexbox Properties Reference

PropertyValuesDescription
displayflex | inline-flexEnables flex context for the container
flex-directionrow | row-reverse | column | column-reverseDefines the main axis direction
flex-wrapnowrap | wrap | wrap-reverseControls whether items wrap to new lines
justify-contentflex-start | center | flex-end | space-between | space-around | space-evenlyAligns items along the main axis
align-itemsflex-start | center | flex-end | stretch | baselineAligns items along the cross axis
align-contentflex-start | center | flex-end | space-between | space-around | stretchDistributes space between wrapped lines
gap<length>Sets spacing between flex items

Flexbox vs. CSS Grid

Flexbox

  • One-dimensional (row or column)
  • Content-driven sizing
  • Best for component layouts
  • Items can grow and shrink dynamically
  • Great for centering and distributing space

CSS Grid

  • Two-dimensional (rows and columns)
  • Container-driven sizing
  • Best for page-level layouts
  • Explicit row and column tracks
  • Great for complex grid structures

Common Flexbox Patterns

Centering

display: flex;
justify-content: center;
align-items: center;

Navbar Layout

display: flex;
justify-content: space-between;
align-items: center;

Equal Width Cards

display: flex;
flex-wrap: wrap;
gap: 16px;
/* children: flex: 1 1 300px; */

Sticky Footer

display: flex;
flex-direction: column;
min-height: 100vh;
/* footer: margin-top: auto; */

Frequently Asked Questions