A CSS flexbox generator lets you configure one-dimensional flex layouts visually without memorizing every property. Flexbox controls navigation bars, card rows, centered heroes, and any component where items need to flow in a single direction. Adjust direction, wrapping, spacing, and alignment, then see live results instantly and export production-ready CSS.
Container Properties
Presets
Live Preview
Container has min-height 200pxCSS Output
How to Use the CSS Flexbox Generator
CSS Flexbox is the most practical layout system for component-level design. Navigation bars, button groups, card rows, form fields, and centered heroes all use Flexbox. With five core container properties and three item properties, this free CSS flexbox generator lets you see every combination visually and export production CSS instantly.
Step 1: Set the Main Axis Direction
The flex-direction property defines which direction items flow. row (default) arranges items left-to-right. column stacks them top-to-bottom. The reverse options flip the order. The live preview updates immediately to show how direction affects item placement.
Step 2: Configure Wrapping
flex-wrap controls what happens when items don't fit on one line. nowrap forces all items onto one line (they shrink to fit). wrap breaks items onto multiple lines when needed — essential for responsive card grids and tag lists.
Step 3: Adjust Alignment
justify-content spaces items along the main axis. space-between is perfect for navigation bars. center centers all items. align-items aligns items on the cross axis — center vertically centers items in a row.
Step 4: Use Presets
Click a preset to load common Flexbox patterns instantly: Centered centers all items both ways, Space Between Nav creates a navigation bar layout, Card Row is a horizontal card grid, Sidebar Layout creates a two-column layout, and Vertical Stack stacks items in a column.
Step 5: Copy and Use
Click Copy CSS to copy the complete display: flex container style including all properties. The CSS output is production-ready and works in all modern browsers — paste into your stylesheet and apply the class to your container element.
FAQ
Is this CSS flexbox generator free?
Yes, completely free with no limits or account required. All flexbox configuration and preview runs locally in your browser — no data is sent anywhere.
What is CSS Flexbox?
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout system that arranges items along a main axis (horizontal or vertical). It excels at distributing space, aligning items, and building navigation bars, card rows, and component-level layouts.
What is the difference between justify-content and align-items?
justify-content controls alignment along the main axis (horizontal when flex-direction is row). align-items controls alignment along the cross axis (vertical when flex-direction is row). For a row flexbox: justify-content aligns left-right, align-items aligns top-bottom.
When should I use flex-wrap: wrap?
Use flex-wrap: wrap when you want flex items to break onto new lines if they don't fit in one row. Without wrap (nowrap), items shrink to fit on one line and can overflow on small screens. Wrap is essential for responsive card layouts.
What does flex-grow do?
flex-grow defines how much an item grows relative to other items in the same container when there is extra space. A value of 1 means the item takes an equal share of free space. A value of 2 means the item takes twice as much space as items with flex-grow: 1.
What is the difference between align-items and align-content?
align-items aligns items within a single line along the cross axis. align-content aligns multiple lines (only applies when flex-wrap is enabled and items wrap to more than one line). For single-line flexbox, align-content has no effect.
What is align-self in Flexbox?
align-self overrides the container's align-items setting for a specific individual item. This lets one item align differently from the rest — for example, stretch all items to full height but align one specific item to the top.
How do I center an element both horizontally and vertically?
Set the parent container to display: flex; justify-content: center; align-items: center. This centers the child both horizontally and vertically. It's one of the most common Flexbox patterns, and the Centered preset in this generator applies it instantly.