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  3. CSS Flexbox & Grid Playground
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Learn flexbox and grid by playing

Unlike online playgrounds that just show a code editor, this tool gives you interactive controls for every flexbox and CSS grid property — direction, wrap, alignment, gap, template columns, template rows — with a live visual result and generated CSS.

How to Use

  1. 1Switch between Flexbox and Grid mode.
  2. 2Add child elements and adjust their individual properties.
  3. 3Use the control panel to set container properties (direction, wrap, alignment, gap).
  4. 4Watch the layout update in real time.
  5. 5Copy the generated CSS for both container and children.

Key Features

  • Flexbox container and item property controls
  • CSS Grid template-columns and template-rows editors
  • Gap, alignment, and justification sliders
  • Add, remove, and resize child elements
  • Live visual preview
  • Generated CSS for container and items
  • Responsive preview at different widths

Common Use Cases

  • Learning CSS layout

    Understand how flexbox and grid properties work by experimenting with live visual feedback.

  • Rapid layout prototyping

    Quickly build a layout structure and grab the CSS instead of trial-and-error in a code editor.

  • Teaching and demos

    Demonstrate layout concepts to students or teammates with an interactive visual tool.

  • Debugging layout issues

    Reproduce a layout problem in the playground to understand which property is causing unexpected behavior.

The Details

Flexbox and CSS Grid each have over a dozen properties that interact in non-obvious ways. This playground lets you toggle and adjust every property through visual controls while watching the layout respond in real time. It bridges the gap between reading about justify-content: space-between and actually seeing what it does to a set of child elements.

Frequently Asked Questions

When should I use Flexbox vs. Grid?

Flexbox is ideal for one-dimensional layouts (a row OR a column). Grid excels at two-dimensional layouts where you need control over rows AND columns simultaneously.

Can I nest Flexbox inside Grid?

Absolutely. It's a common pattern to use Grid for the overall page layout and Flexbox for component-level alignment within grid cells.

What does "gap" do differently in Flexbox vs. Grid?

The gap property works the same way in both: it adds spacing between items without adding space at the edges. In Grid, you can also use row-gap and column-gap independently.

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All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.