CSS Flexbox Generator

About this tool

Build a CSS flexbox layout visually — adjust direction, wrapping, alignment, and gap with live sliders and dropdowns, watch a preview update instantly, then copy the exact CSS for your container.

Frequently asked questions

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

justify-content controls spacing along the main axis (horizontal for row, vertical for column); align-items controls alignment along the cross axis (perpendicular to the main axis).

What does align-content do if I only have one row of items?

Nothing visible — align-content only has an effect when flex-wrap creates multiple lines and there's extra space to distribute between them.

Do I need to set anything on the child items?

Not for basic layout — everything shown here is a container-level (display: flex) property. Individual items can additionally use flex-grow, flex-shrink, or align-self for per-item control, which this generator doesn't cover.