Flexbox Playground
Experiment with flex-direction, justify-content, align-items, wrap, and gap on a live layout, then copy the flexbox CSS.
Learn flexbox by moving things
Flexbox is the layout tool most developers use every day and still second-guess. The properties interact in ways
that are far easier to understand by watching than by reading: change flex-direction and suddenly
justify-content and align-items swap the axis they control. This playground makes that
tangible — pick values from the menus and a live row of items rearranges instantly.
Use it to nail a navbar, a button group, a centered hero, or a wrapping card row, then copy the container CSS straight into your project. It's equally handy as a teaching aid: toggle one property at a time to build a real feel for how the main axis and cross axis behave.
Flex, previewed
justify-content aligns items along the main axis and align-items along the cross axis, and flex-direction swaps which is which. The playground renders it live in your browser.
Frequently Asked Questions
What does the flexbox playground do?
It lets you set the main flex container properties — direction, justify-content, align-items, wrap, and gap — and shows a live row of items responding to each, with copy-ready CSS.
What is the difference between justify-content and align-items?
justify-content aligns items along the main axis (the flex-direction), while align-items aligns them along the cross axis. Switching direction swaps which one controls horizontal vs vertical.
When should I use flexbox vs grid?
Flexbox excels at one-dimensional layouts — a row or column of items, like a navbar or toolbar. Grid is better for two-dimensional layouts with rows and columns together.
Is this tool free and private?
Yes. Everything runs in your browser — no sign-up and nothing uploaded.
Want responsive layouts built properly? Let’s talk.