.container {
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: stretch;
flex-wrap: nowrap;
gap: 8px;
}Visual Flexbox generator with live preview. Adjust direction, alignment, distribution, and gap to create perfect layouts.
What is Flexbox Generator?
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout system for arranging items in rows or columns. Items flex to fill available space or shrink to prevent overflow. Flexbox handles alignment, distribution, and spacing automatically - perfect for navigation bars, card layouts, centering content, and responsive design. This generator lets you configure flex properties visually.
How to Use
- Set flex-direction: row (horizontal) or column (vertical)
- Choose justify-content for main axis alignment
- Select align-items for cross axis alignment
- Enable flex-wrap for multi-line layouts
- Adjust gap for spacing between items
- Copy generated CSS to your stylesheet
Why Use This Tool?
Tips & Best Practices
- justify-content controls horizontal alignment in row, vertical in column
- align-items is the opposite axis from justify-content
- Use flex-wrap: wrap for responsive multi-line layouts
- gap replaces margin-based spacing
- center both axes: justify-content: center + align-items: center
- space-between distributes items with edges at start/end
Frequently Asked Questions
What is flex-direction?
flex-direction sets the main axis: row (horizontal, left-to-right), row-reverse (right-to-left), column (vertical, top-to-bottom), column-reverse (bottom-to-top). All other flex properties work relative to this main axis direction.
What's the difference between justify-content and align-items?
justify-content aligns items along the main axis (the direction set by flex-direction). align-items aligns along the cross axis (perpendicular to main axis). In row direction, justify is horizontal, align is vertical. In column, they swap.
When should I use flex-wrap?
Use flex-wrap: wrap when items might overflow the container width/height. Items wrap to multiple lines instead of shrinking. Essential for responsive layouts where content adapts to screen size.
What does gap property do?
gap sets spacing between flex items - both horizontal and vertical when wrap is enabled. Replaces margin-based spacing with simpler, more predictable behavior. Gap isn't added at edges (start/end of container).
How do I center content with flexbox?
Set justify-content: center (main axis) and align-items: center (cross axis). This centers items both horizontally and vertically regardless of flex-direction. The simplest way to center content in CSS.
Flexbox or Grid - which should I use?
Flexbox for one-dimensional layouts (single row/column): navigation, cards, centering. Grid for two-dimensional layouts (rows AND columns together): page structure, complex component layouts. Use Flexbox for component internals, Grid for page structure.