CSS Flexbox Playground
Experiment with Flexbox container and item properties in a live visual playground. Adjust direction, alignment, wrapping, and per-item flex values.
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What Is a Flexbox Playground?
A Flexbox playground is an interactive tool that lets you experiment with CSS Flexbox layout properties visually. You change container settings like direction, justification, and alignment, and immediately see how flex items rearrange. It helps developers learn Flexbox or quickly prototype layouts without writing CSS from scratch.
How to Use the Flexbox Playground
- Set container props — Choose flex-direction, justify-content, align-items, wrap, and gap
- Add/remove items — Use the buttons to add or remove flex items (3 to 10)
- Edit item props — Click any item to set its flex-grow, shrink, basis, order, and align-self
- See preview — Watch the layout update in real-time
- Copy CSS — Click copy to get the generated CSS for both container and items
Why Use This Flexbox Playground?
- Visual Learning — Understand Flexbox by seeing changes instantly
- Per-Item Control — Set individual flex-grow, shrink, basis, order, and align-self
- Clean CSS Output — Get well-formatted CSS you can paste directly into your project
- No Installation — Works instantly in any modern browser
- Privacy — All processing happens locally, no data sent anywhere
FreeToolbox vs Other Flexbox Tools
| Feature | FreeToolbox | Flexbox Froggy | CSS-Tricks Guide |
|---|---|---|---|
| Interactive | Full editor | Game-based | Static examples |
| Per-item props | Yes | Limited | No |
| CSS export | Yes | No | No |
| Gap support | Yes | No | N/A |
| Dark theme | Yes | No | No |
FAQ
How many items can I add?
You can have between 1 and 10 flex items. Each item is color-coded and individually configurable.
What does flex-grow do?
flex-grow determines how much an item should grow relative to other items when extra space is available. A value of 0 means no growth, 1 means it takes its share of remaining space.
What is the difference between flex-basis and width?
flex-basis sets the initial size of a flex item before space distribution. It works along the main axis (width in row direction, height in column). Unlike width, it participates in the flex algorithm.
Can I use this for responsive layouts?
Yes. Combine flex-wrap with percentage-based flex-basis values to create responsive layouts. The playground helps you experiment before writing final CSS.
Is this tool free?
Yes, completely free with no limits or registration required.