CSS Flexbox Generator
display: flex; flex-direction: row; justify-content: flex-start; align-items: stretch; flex-wrap: nowrap; gap: 12px;
What is CSS Flexbox Generator?
CSS Flexbox Generator is a free visual tool that helps web developers create flexible box layouts without memorizing complex CSS syntax. Flexbox (Flexible Box Layout) is a CSS layout model designed for building responsive one-dimensional layouts - either rows or columns. This flexbox playground lets you visually configure flex container properties including flex-direction (row, column, reverse), justify-content (alignment along main axis), align-items (alignment along cross axis), flex-wrap (single or multiple lines), and gap (spacing between items). As you adjust each property, the live preview updates instantly, showing exactly how your flexbox layout will behave. The tool generates clean, copy-paste CSS code that works in all modern browsers. Whether you are building navigation menus, card grids, centering content, or creating complex responsive layouts, this CSS flexbox generator eliminates trial-and-error and helps you understand how each flexbox property affects your layout.
How to Use This Tool
Select a flex-direction to set the main axis (row for horizontal, column for vertical)
Choose justify-content to align items along the main axis
Set align-items to align items along the cross axis
Toggle flex-wrap if you want items to wrap to new lines
Adjust the gap slider to add spacing between flex items
Add or remove items using the +/- buttons to test your layout
Watch the live preview update as you change each property
Copy the generated CSS code and paste it into your project
Features
- Visual flexbox playground with instant live preview
- Configure flex-direction: row, column, and reverse options
- Set justify-content: start, end, center, space-between, around, evenly
- Adjust align-items: start, end, center, stretch, baseline
- Control flex-wrap for single or multi-line layouts
- Customize gap spacing between flex items
- Add or remove items to test different scenarios
- One-click copy generated CSS flexbox code
- Free tool with no signup required
Frequently Asked Questions
- What is CSS Flexbox and when should I use it?
CSS Flexbox (Flexible Box Layout) is a layout model for arranging items in one dimension - either a row or column. Use flexbox for navigation menus, card layouts, centering content, distributing space between items, and building responsive components. For two-dimensional layouts (rows AND columns), use CSS Grid instead.
- What is the difference between justify-content and align-items in flexbox?
justify-content aligns items along the main axis (horizontal in row, vertical in column). align-items aligns items along the cross axis (vertical in row, horizontal in column). Think of justify as "along the direction items flow" and align as "perpendicular to that direction".
- How do I center a div with CSS Flexbox?
To center a div with flexbox, set the parent container to display: flex; justify-content: center; align-items: center;. This centers the child both horizontally and vertically. For only horizontal centering, use justify-content: center. For only vertical, use align-items: center.
- What does flex-wrap do in CSS Flexbox?
flex-wrap controls whether flex items stay on one line or wrap to multiple lines. nowrap (default) forces all items on one line, potentially causing overflow. wrap allows items to flow onto new lines when they run out of space. wrap-reverse wraps in the opposite direction.
- How do I add space between flexbox items?
Use the gap property to add consistent spacing between flex items: gap: 16px;. You can also use row-gap and column-gap separately. Before gap was widely supported, developers used margins, but gap is now the preferred method and works in all modern browsers.
- What is the difference between CSS Flexbox and CSS Grid?
Flexbox is one-dimensional - it handles layout in a row OR column. Grid is two-dimensional - it handles rows AND columns simultaneously. Use flexbox for components like navbars, card rows, and centering. Use grid for page layouts, galleries, and complex two-dimensional designs.