CSS Flexbox & Grid Playground

Container Properties

Items: 5

Click an item in the preview to configure its individual properties.

Live Previewdisplay: flex
Item 1
Item 2
Item 3
Item 4
Item 5

Generated CSS

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

What This Tool Does

CSS Flexbox & Grid Playground is built for deterministic developer and agent workflows.

Interactive CSS Flexbox and Grid playground with live visual preview and code output.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

Best Path For Builders

Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/flexbox-playground/

For automation planning, fetch the canonical contract at /api/tool/flexbox-playground.json.

How to Use CSS Flexbox & Grid Playground

  1. 1

    Start with flex container setup

    Set up your HTML structure with a container and child items. Choose between Flexbox and Grid mode at the top of the playground.

  2. 2

    Adjust flex properties with sliders

    Use interactive controls to set flex-direction (row/column), justify-content (space-between, center, etc.), and align-items. Review updates in real time on the canvas.

  3. 3

    Control individual item flex properties

    Click on any item in the preview to set its flex-grow, flex-shrink, and flex-basis. Watch how it affects layout dynamically.

  4. 4

    Switch to Grid and build grid layouts

    Toggle to Grid mode, set grid-template-columns (e.g., 'repeat(3, 1fr)'), grid-gap, and placement. Visualize your grid immediately.

  5. 5

    Copy CSS code to your project

    Copy the generated CSS from the code panel and paste directly into your stylesheet. All values are production-ready.

Frequently Asked Questions

What is CSS Flexbox & Grid Playground?
CSS Flexbox & Grid Playground is an interactive visual tool for experimenting with CSS Flexbox and Grid layouts. It shows a live preview as you adjust properties, and outputs clean CSS code you can copy.
How do I use CSS Flexbox & Grid Playground?
Choose between Flexbox or Grid mode, then adjust layout properties like direction, alignment, gap, and wrapping using the visual controls. The live preview updates instantly, and you can copy the generated CSS code.
Is CSS Flexbox & Grid Playground free?
Yes. This tool is free to use with immediate access—no account required.
Does CSS Flexbox & Grid Playground store or send my data?
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is sent to any server.
Can I add and remove child elements in the playground?
Yes. You can add, remove, and resize child items to see how the layout responds. This makes it easy to prototype real-world layouts and understand how Flexbox and Grid distribute space across different numbers of elements.