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Generator

Free Online CSS Flexbox Generator & Playground

Learn and build CSS Flexbox layouts visually without writing code. Adjust flex container properties (direction, wrap, justify-content, align-items, align-content, gap) and flex item properties (order, grow, shrink, basis, align-self) with interactive controls. See changes reflected instantly in the live preview with customizable child items. Copy the generated CSS code for both the container and items. Perfect for learning flexbox concepts and rapid layout prototyping.

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display: flex;
flex-direction: row;
flex-wrap: nowrap;
justify-content: flex-start;
align-items: stretch;
gap: 10px;

Common questions

What's the difference between justify-content and align-items?

justify-content aligns items along the main axis (horizontal in row direction, vertical in column). align-items aligns items along the cross axis (perpendicular to the main axis). Think of justify as 'along the flow' and align as 'across the flow'.

When should I use Flexbox vs. CSS Grid?

Use Flexbox for one-dimensional layouts (a row OR a column of items) — navbars, card rows, centering content. Use CSS Grid for two-dimensional layouts (rows AND columns simultaneously) — page layouts, dashboards, image galleries. They can also be combined.