CSS Flexbox Generator
Master flexible layouts with CSS Flexbox. Design responsive layouts with interactive controls, visual preview, and instant CSS output.
Layout Presets
Flexbox Properties
Live Preview
Dashed border shows the flex container boundaries
Generated CSS
.container {
display: flex;
}Recommended Settings
Flexbox Best Practices
- •Use flex for one-dimensional layouts (row or column)
- •Prefer gap property over margins for consistent spacing
- •Use justify-content for main axis, align-items for cross axis
- •Wrap content with flex-wrap for responsive layouts
Common Patterns
- •Navbar: justify-content: space-between for logo and menu
- •Centering: justify-content + align-items set to center
- •Card grid: flex-wrap: wrap with gap for responsive cards
- •Sidebar: Use flex-grow on main content for flexible width
Pro Tips
- •flex-direction determines the main axis (row = horizontal, column = vertical)
- •align-items works on the cross axis (perpendicular to flex-direction)
- •space-between is perfect for navbar layouts (logo left, nav right)
- •Use flex-wrap: wrap for responsive card grids that stack on mobile
Most Popular
justify-content: space-between; align-items: center; gap: 16px;
When to Use This Tool
Create horizontal navigation with logo on left and menu on right using space-between. Perfect for headers and footers with distributed content.
Recommended: justify-content: space-between
Build responsive card layouts that wrap to multiple rows. Use flex-wrap with gap for consistent spacing between cards that stack on smaller screens.
Recommended: flex-wrap: wrap + gap
Perfectly center content both horizontally and vertically. The classic centering solution that works for any content type.
Recommended: justify-content: center + align-items: center
Align form labels and inputs horizontally or create button groups. Use align-items for vertical alignment of elements with different heights.
Recommended: align-items: center
Create flexible hero layouts with text and images. Use flex-direction: column-reverse on mobile for image-first responsive design.
Recommended: flex-direction with media queries
How It Works
Choose a preset layout or start from scratch
Select flex-direction (row or column) for main axis
Set justify-content for main axis alignment
Set align-items for cross axis alignment
Add gap for spacing between items
Adjust number of items to see layout behavior
Copy CSS code to use in your project
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Frequently Asked Questions
What's the difference between justify-content and align-items?
justify-content aligns items along the main axis (horizontal for row, vertical for column). align-items aligns items along the cross axis (perpendicular to main axis). For row direction: justify-content is horizontal, align-items is vertical. For column: it's reversed.
When should I use Flexbox vs CSS Grid?
Use Flexbox for one-dimensional layouts (items in a row OR column). Use Grid for two-dimensional layouts (rows AND columns). Flexbox is perfect for navigation, button groups, and card rows. Grid is better for page layouts, photo galleries, and complex grids.
What does flex-wrap do?
flex-wrap: wrap allows flex items to wrap to multiple lines when they don't fit in a single row/column. Without wrap (nowrap), items shrink to fit. Wrap is essential for responsive card grids and layouts that should stack on smaller screens.
How do I center content with Flexbox?
Set both justify-content: center and align-items: center on the flex container. This centers content both horizontally and vertically. Works for any content and is the most reliable centering method in modern CSS.
What is the gap property?
gap creates space between flex items without using margins. It's simpler and more consistent than margins because it only adds space BETWEEN items, not on the outer edges. Fully supported in modern browsers and recommended over margin-based spacing.
Can I use Flexbox for page layouts?
Yes, but CSS Grid is usually better for full page layouts. Flexbox works great for simpler page layouts like header-content-footer, or sidebar-main. For complex layouts with both rows and columns, Grid provides better control.