Flexbox Generator
Generate CSS Flexbox layout code visually.
display: flex; flex-direction: row; justify-content: flex-start; align-items: stretch; flex-wrap: nowrap; gap: 8px;
How to use Flexbox Generator
Set Container Dimensions
Click the width and height input fields in the left panel and enter your desired container size in pixels or percentages. The preview panel on the right updates instantly to show your container with a blue border outline.
Configure Flexbox Properties
Select display direction from the 'flex-direction' dropdown (row, column, row-reverse, column-reverse). Then toggle 'flex-wrap' to on/off and choose 'justify-content' (flex-start, center, space-between, space-around, space-evenly) from the dropdown menus in the properties panel.
Adjust Alignment and Gap
Use the 'align-items' dropdown to align items vertically (flex-start, center, stretch, baseline). Set the gap value in pixels between flex items using the gap slider or input field. Watch the preview update in real-time.
Add and Customize Flex Items
Click the 'Add Item' button to insert flex children. Drag items in the preview to reorder them, or adjust individual item flex-grow, flex-shrink, and flex-basis values in the right sidebar. Items display with numbered labels and colored backgrounds.
Copy and Export Code
Click the 'Copy CSS' button to copy all generated code to your clipboard. The code includes container styles and item styles ready to paste into your CSS file or style tag. Use the 'Export HTML' button to download a complete HTML file with embedded styles.
How to Use Flexbox Generator Online — Complete Free Guide 2026
Flexbox layouts are essential for modern responsive web design, but writing CSS Flexbox code manually can be time-consuming and error-prone. A Flexbox Generator solves this by letting you create professional layouts visually without writing code from scratch.
What Is a Flexbox Generator?
A Flexbox Generator is a free online tool that helps you build CSS Flexbox layouts by dragging, clicking, and configuring properties visually. Instead of memorizing flex-direction, justify-content, and align-items syntax, you see changes instantly in a live preview. The tool generates clean, production-ready CSS code that you can copy directly into your project.
Why Use a Flexbox Generator?
Flexbox is powerful but has a steep learning curve. Key benefits of using a generator include: faster layout creation (minutes instead of hours), eliminating syntax errors, learning Flexbox properties by seeing them in action, testing responsive breakpoints instantly, and exporting code in multiple formats.
Step-by-Step: How to Create a Layout
Step 1: Set Your Container Size Start by defining your container dimensions. Enter width and height values in pixels or percentages in the left panel. For responsive layouts, use percentages like 100% width and 400px height. The preview updates immediately showing your container.
Step 2: Choose Flex Direction Select flex-direction from the dropdown menu. Row arranges items left-to-right (default), column stacks them vertically, row-reverse and column-reverse flip the order. Your preview shows items reorienting in real-time.
Step 3: Set Main Axis Alignment Use justify-content to align items along the main axis. Options include flex-start (default), center, space-between (equal gaps), space-around (gaps around items), and space-evenly (equal space everywhere). Watch spacing adjust in the preview.
Step 4: Configure Cross Axis Alignment Set align-items to control vertical alignment (for row direction). Choose flex-start, center, or stretch to match item heights to container. Toggle flex-wrap if items should wrap to multiple lines.
Step 5: Add Flex Items Click Add Item to insert child elements. Drag items in the preview to reorder them. Adjust individual item properties like flex-grow (expansion ratio) and flex-basis (starting size) in the sidebar.
Step 6: Copy Your Code Click Copy CSS to grab the generated code, or click Export HTML to download a complete file. Paste the CSS into your stylesheet and start using your layout immediately.
Common Flexbox Patterns You Can Build
Navbar Layout: flex-direction: row, justify-content: space-between creates logo-left, links-right navigation.
Centered Hero Section: flex-direction: column, justify-content: center, align-items: center creates perfect center alignment.
Card Grid: flex-direction: row, flex-wrap: wrap, gap: 20px displays responsive card grids.
Sidebar + Main Content: Use flex-grow: 1 on main area with fixed sidebar width for asymmetric layouts.
Tips for Best Results
Use percentages for widths to make layouts responsive. Test your layout at mobile (320px), tablet (768px), and desktop (1200px) widths. Set gap values to maintain consistent spacing between items. Use flex-grow on items that should expand to fill space. Preview your code on actual devices before deploying to production.
Flexbox Generator vs. Manual CSS
Manual Flexbox requires remembering 10+ properties and their values. A Flexbox Generator eliminates guesswork, shows visual feedback instantly, and generates error-free code. Perfect for beginners learning Flexbox and experienced developers saving time.
Get Started Free Today
Flexbox Generator is completely free with no registration required. Start building responsive layouts instantly at no cost. No ads, no paywalls, no hidden fees—just pure visual Flexbox creation. Bookmark it for future projects and share with team members learning CSS Flexbox.
Begin creating your first Flexbox layout now and export production-ready CSS in seconds.