Codify Tools

CSS Flexbox Generator & Playground

Visually test flex direction, alignment, grow, shrink, and gap with instant copyable CSS output.

Container Properties

gap spacing (16px)

Item Customization (4 items)

Configuring: Item 1
ID: 1
Live Flexbox Playground Canvas4 items
Item 1
g:0 s:1b:auto
Item 2
g:0 s:1b:auto
Item 3
g:0 s:1b:auto
Item 4
g:0 s:1b:auto

💡 Click any flex item box above to select and edit its individual flex property rules.

Generated CSS Code

How the CSS Flexbox Generator & Playground Works

The CSS Flexbox Generator (Flexible Box Layout) is an interactive developer tool designed to eliminate manual trial and error when configuring one-dimensional user interface layouts. CSS flexbox provides an efficient, responsive way to lay out, align, and distribute space among items in a container, even when their size is unknown or dynamic.

Understanding Key Flexbox Properties

Flexbox layout is divided into parent container properties and child flex item properties:

Parent Container Properties

  • flex-direction: Establishes the main axis (`row`, `column`, `row-reverse`, `column-reverse`).
  • justify-content: Aligns flex items along the main axis (`center`, `space-between`, `space-around`, `flex-start`, `flex-end`).
  • align-items: Aligns items along the cross axis (`stretch`, `center`, `flex-start`, `flex-end`, `baseline`).
  • flex-wrap: Controls multi-line wrap behavior (`nowrap`, `wrap`, `wrap-reverse`).
  • gap: Sets modern gutter spacing between adjacent flex items.

Child Item Properties

  • flex-grow: Defines the proportional growth factor if extra free space exists.
  • flex-shrink: Defines how much an item shrinks when container space is constrained.
  • flex-basis: Sets the default initial size before remaining space is distributed (`auto`, `0`, or fixed unit).
  • align-self: Overrides the parent `align-items` property for an individual flex item.

Frequently Asked Questions — Flexbox Playground

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