CSS Flexbox Generator

What is CSS Flexbox?

CSS Flexbox (Flexible Box Layout) is a one-dimensional layout system that distributes space and aligns elements along a single axis — either a row or a column. You create a flex container with display: flex, and all direct children automatically become flex items. On the container, flex-direction sets the main axis (row, column, row-reverse, column-reverse), justify-content controls spacing along the main axis (flex-start, flex-end, center, space-between, space-around, space-evenly), and align-items controls alignment on the cross axis (stretch, center, flex-start, flex-end, baseline). On individual items, flex-grow determines how spare space is distributed, flex-shrink controls how items compress when space is tight, and flex-basis sets the item's starting size before growing or shrinking. Flexbox replaced most float-based layouts and is perfect for navigation bars, centered content, card rows, and responsive toolbars.

How to Use the CSS Flexbox Generator

• Adjust container properties (flex-direction, flex-wrap, justify-content, align-items, align-content, gap) using the controls on the left.

• Watch the live preview update in real time as you change settings.

• Click any item in the preview to select it — selected items are highlighted.

• Configure the selected item's flex-grow, flex-shrink, flex-basis, and align-self in the item panel.

• Click '+ Add Item' to add more flex items; click 'Remove' to delete the selected item.

• Switch between the CSS and HTML output tabs to see the generated code.

• Click Copy to copy the CSS or HTML to your clipboard.