Your CSS Flexbox Playground & Generator
Free visual CSS flexbox generator. Adjust direction, wrap, justify-content, align-items and gap with live controls, see boxes rearrange instantly.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Your input
The actionA real example, step by step
Real data entered into the CSS Flexbox Playground & Generator, one screenshot per step. Nothing is mocked up.
Open the tool
The CSS Flexbox Playground & Generator opens ready to use, nothing to install or sign up for.
Enter your data
Real input used here: gap (px) 12; flex-grow 0; flex-shrink 1.
Press Add box
The CSS Flexbox Playground & Generator shows the result straight away, below the same form.
What is the CSS Flexbox Playground & Generator?
Flexbox properties like justify-content, align-items and flex-wrap are easy to mix up because their effect depends on the flex-direction, and it is hard to picture the result just from property names. This playground shows a live row of coloured boxes inside a container, and every control you change — direction, wrap, justify-content, align-items, align-content and gap — updates the layout instantly so you can see exactly what each property does.
Once the layout looks right, the exact CSS for the container is generated automatically, ready to copy into your stylesheet. You can also add or remove boxes and adjust an individual box's flex-grow, flex-shrink and align-self to understand how item-level properties interact with the container's settings.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
See real boxes rearrange as you change any flexbox property.
Direction, wrap, justify-content, align-items, align-content, gap.
Test flex-grow, flex-shrink and align-self on individual boxes.
Generated container and item CSS, ready to paste.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Students learning CSS
See cause and effect for every flexbox property in real time.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
What's the difference between justify-content and align-items?
justify-content aligns items along the main axis (the direction set by flex-direction), while align-items aligns them along the cross axis (perpendicular to it).
Does this work for CSS Grid too?
No, this is specifically for flexbox; grid-template-columns and related grid properties work differently and aren't covered here.
Can I copy CSS for individual items, not just the container?
Yes, each box has its own flex-grow, flex-shrink and align-self values shown alongside the container CSS.
Is flexbox supported in all browsers?
Yes, flexbox has full support in all modern browsers and has for many years.
What does gap do compared to margin?
gap adds spacing only between items, not around the outer edge, avoiding the classic extra-margin-on-the-last-item problem.
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Try the CSS Flexbox Playground & Generator now
Visually build a flexbox layout and get the generated CSS. Free to use.
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