Flexbox Generator
Live Preview
Why Use a Visual Flexbox Generator?
CSS Flexbox has many interacting properties — flex-direction, justify-content, align-items, align-content, flex-wrap — and their interactions can be confusing. Our visual generator lets you adjust each property via a dropdown and see the layout update live in real-time, making it the fastest way to learn Flexbox and build layouts without the trial-and-error cycle.
Live Visual Preview
See exactly how your Flexbox layout behaves as you change each property — no guesswork
All Properties Covered
Covers flex-direction, justify-content, align-items, flex-wrap, and gap in one interface
Ready CSS Output
Copies a clean .container {} block ready to paste into your stylesheet
How to Build a Flexbox Layout
Set Direction & Wrap
Choose flex-direction (row/column) and flex-wrap to control the main axis and overflow
Align Items
Set justify-content and align-items to control how items are distributed and aligned
Copy CSS
Click 'Copy CSS' to get the complete .container CSS block ready for your project
Flexbox Use Cases
Navigation Bars
Flexbox is ideal for horizontal navbars — use justify-content: space-between for logo + links
Card Grids
Use flex-wrap: wrap with a fixed flex-basis for responsive card grids that wrap on mobile
Perfect Centering
justify-content: center + align-items: center is the easiest way to center anything
Form Layouts
Align form labels and inputs horizontally or vertically with Flexbox for clean, consistent forms
Flexbox Best Practices
✓ Understand Main Axis vs Cross Axis
justify-content controls the main axis (row direction = horizontal). align-items controls the cross axis. These swap when you use flex-direction: column.
✓ Use flex: 1 for Flexible Items
Adding flex: 1 to a flex child makes it grow to fill available space. Combine with min-width: 0 to prevent overflow in flex children.
✓ Use gap Instead of Margins
The gap property creates consistent space between flex items without adding margins to the outer edges — much cleaner than margin-based spacing.
✓ Use Grid for 2D Layouts
Flexbox controls one axis at a time (row OR column). For true 2D grid layouts where you need control over both rows and columns, use CSS Grid instead.
❓ Frequently Asked Questions
When should I use Flexbox vs CSS Grid?
Flexbox is best for 1D layouts — distributing items along a single row or column (navbars, button groups, form rows). CSS Grid excels at 2D layouts where you control both rows and columns simultaneously (page layouts, card grids).
What does flex-wrap: wrap do?
By default, flex items are forced onto one line even if they overflow. flex-wrap: wrap allows items to drop to a new line when they would overflow the container — essential for responsive layouts.
What is the difference between align-items and align-content?
align-items aligns flex items within a single row (cross axis alignment). align-content only applies when there are multiple rows (flex-wrap: wrap) and controls how those rows are distributed within the container.
How do I make equal-width columns with Flexbox?
Apply flex: 1 to each flex child. This makes all children grow equally to fill the available space. Use flex: 0 0 33.33% for exactly 3 equal columns regardless of content.