CSS Flexbox Generator

Client-Side New

Design Flexbox layouts with a visual builder and get production-ready CSS code. Set flex direction, justify-content, align-items, flex-wrap, and gap with instant preview. Add, remove, and configure child items with individual flex-grow, flex-shrink, and flex-basis values. See your layout update in real time as you adjust properties. Copy the generated CSS for both the container and child elements.

Container Properties

Flex Items (3)

#1
#2
#3

Preview

1
2
3

CSS Output

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

.flex-item {
  flex-grow: 0;
  flex-shrink: 1;
  flex-basis: auto;
}

How to Use

  1. 1

    Set Container Properties

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

  2. 2

    Configure Items

    Add or remove flex items and set their individual grow, shrink, and basis values.

  3. 3

    Copy CSS

    Copy the generated CSS code for the container and items.

Examples by Niche

Navigation Bar

Row direction, space-between, align-items center — standard nav layout

Card Grid

Row direction, wrap, 16px gap — responsive card layout that wraps on small screens

Sidebar Layout

Row direction, sidebar: flex-basis 250px, content: flex-grow 1

Frequently Asked Questions

What Flexbox properties can I configure?

The container supports flex-direction, justify-content, align-items, align-content, flex-wrap, and gap. Each child supports flex-grow, flex-shrink, flex-basis, align-self, and order.

Can I add multiple child elements?

Yes, add as many child elements as you need. Each child can have independent flex properties, letting you experiment with complex layouts.

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.

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

justify-content controls alignment along the main axis (horizontal by default), while align-items controls alignment along the cross axis (vertical by default). For a row layout, justify-content handles horizontal spacing and align-items handles vertical positioning. These swap when you set flex-direction to column.

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