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Free Online CSS Flexbox Generator

Build CSS flexbox layouts visually

flex-direction
justify-content
align-items
flex-wrap
gap: 8px
Item 1
flex-grow: 0
flex-shrink: 1
order: 0
flex-basis
Item 2
flex-grow: 0
flex-shrink: 1
order: 0
flex-basis
Item 3
flex-grow: 0
flex-shrink: 1
order: 0
flex-basis
1
2
3

Live preview — adjust controls above to see changes instantly.

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

How to Use Flexbox Generator

  1. 1

    Set container properties

    Choose flex direction, justify-content, align-items, wrap, and gap.

  2. 2

    Configure items

    Adjust flex-grow, shrink, basis, and order for each flex item.

  3. 3

    Add or remove items

    Use the Add/Remove buttons to change the number of flex items.

  4. 4

    Copy CSS

    Click Copy to get the generated CSS for container and items.

Frequently Asked Questions

Is my data safe?
Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.
What is the difference between justify-content and align-items?
justify-content controls spacing along the main axis (horizontal for row, vertical for column). align-items controls alignment along the cross axis (perpendicular to main axis).
When should I use flexbox vs CSS Grid?
Use flexbox for one-dimensional layouts (a row or a column). Use CSS Grid for two-dimensional layouts (rows AND columns). Flexbox is better for distributing space among items in a single direction.
What does flex-basis do?
flex-basis sets the initial size of a flex item before flex-grow and flex-shrink are applied. Common values include 'auto' (use the item's content/width), specific lengths like '200px', or percentages like '50%'.

Learn more

About Flexbox Generator

Build CSS flexbox layouts visually with this interactive generator. Configure flex container properties (direction, justify-content, align-items, wrap, gap) and individual item properties (flex-grow, flex-shrink, flex-basis, order). See changes instantly in a live preview with colored boxes, then copy the generated CSS. Perfect for learning flexbox or quickly prototyping layouts.

Why Use Flexbox Generator?
  • Visual interface makes flexbox intuitive — see how each property affects layout in real time.
  • Configure both container and individual item properties for complete control.
  • Great learning tool — experiment with flex properties and see results immediately.
  • Generates clean CSS that only includes non-default values.
Common Use Cases

Navigation layouts

Build horizontal navigation bars with evenly spaced or right-aligned items.

Card grids

Create responsive card layouts that wrap and distribute space evenly.

Centering elements

Quickly set up perfect vertical and horizontal centering with flexbox.

Learning flexbox

Experiment with all flex properties interactively to understand how they work.

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