CSS Flexbox Generator

Build Flexbox layouts visually — control direction, wrapping, alignment, and generate clean CSS.

About CSS Flexbox

Flexbox (Flexible Box Module) is a one-dimensional CSS layout system designed to distribute space along a single axis (row or column) and handle alignment. It solves classic layout problems that were previously impossible or required JavaScript: vertical centering, equal-height columns, dynamic spacing, and responsive reordering of items.

Key concepts: the flex container (parent with display:flex) controls the layout of flex items (direct children). justify-content aligns items along the main axis, align-items aligns them along the cross axis. flex-grow, flex-shrink, and flex-basis (shorthand: flex) control how individual items grow and shrink to fill available space.

FAQ

How do I center an element with Flexbox?
The simplest centering in CSS: on the parent, set display: flex; justify-content: center; align-items: center. This centers the child both horizontally and vertically. For full-screen centering, add height: 100vh to the parent.
What is the difference between justify-content and align-items?
justify-content aligns items along the main axis (horizontal for flex-direction: row). align-items aligns items along the cross axis (vertical for flex-direction: row). The axes swap when you use flex-direction: column.

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