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Flexbox Playground

Interactive flexbox playground. Control all flex container and item properties and get the generated CSS.

Flexbox PlaygroundGratisNieuwCSS & DevRuns in your browser
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.container {
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: stretch;
flex-wrap: nowrap;
gap: 8px;
}

Works in your browser. What you paste or upload is processed on your device.

Key features of the flexbox playground

  • Visual toggle for all major flexbox container properties
  • Add and remove flex items dynamically
  • Adjustable item flex-grow, flex-shrink, flex-basis
  • Live CSS code output that updates with every change
  • Copy complete flex container and item CSS

How to use the flexbox playground

  1. Set flex-direction

    Choose row, row-reverse, column, or column-reverse to set the main axis.

  2. Adjust justify-content

    Control how items are distributed along the main axis.

  3. Set align-items

    Control how items are aligned on the cross axis.

  4. Toggle flex-wrap

    Enable wrapping to see how items flow to new rows/columns.

  5. Copy the CSS

    Click 'Copy CSS' to get the complete flexbox code for your layout.

What is a flexbox playground?

The Flexbox Playground provides an interactive visual environment for exploring and generating CSS Flexbox layouts. Toggle flex properties — flex-direction, justify-content, align-items, flex-wrap, align-content, gap — and see the effect on flex items in real time.

CSS Flexbox is a powerful one-dimensional layout system for arranging items in rows or columns. Understanding how each property interacts takes practice — this playground makes that learning visual and immediate, allowing you to experiment freely before committing to code.

Why use a flexbox playground?

Flexbox has 12+ properties that interact in complex ways, making it challenging to learn from documentation alone. This interactive playground lets you see each property's effect instantly, accelerating understanding and enabling you to design layouts visually before writing a single line of code.

Flexbox playground: frequently asked questions

Something else? Ask the team

What is CSS Flexbox?

Flexbox (Flexible Box Module) is a CSS layout system for arranging items in a single row or column with powerful alignment and distribution controls. It's ideal for navigation bars, card layouts, and centring content.

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

justify-content controls alignment along the main axis (the direction of flex-direction). align-items controls alignment on the cross axis (perpendicular to flex-direction).

When should I use Flexbox vs Grid?

Use Flexbox for one-dimensional layouts (a single row or column). Use CSS Grid for two-dimensional layouts (rows and columns simultaneously). Many layouts use both — Grid for the overall layout, Flexbox for component-level arrangement.

What does flex-grow do?

flex-grow determines how much of the remaining space in a flex container a flex item should take. A value of 1 means the item grows proportionally; 0 means it doesn't grow. Items with higher flex-grow values grow more.

Is Flexbox supported in all browsers?

Yes. CSS Flexbox is supported in all modern browsers and IE11 (with some quirks). For IE10 and earlier, you'd need vendor prefixes and workarounds, but modern web development doesn't need to support these.

Each one opens on its own page and works straight away, with no sign-up.

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Site audit

fieldnote.app · SEO, AEO and GEO

Illustrative data
SEO
82
+6
AEO
64
+11
GEO
58
+9
Pages
48
Fixesby impact
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