CSS Flexbox Generator

Visual CSS Flexbox playground with live preview. Configure container properties like flex-direction, wrap, justify-content, align-items, and gap. Add child items and fine-tune per-item flex-grow, flex-shrink, flex-basis, order, and align-self. Copy production-ready CSS instantly.

⚙ Container Properties
📦 Flex Items
3 items (max 12)

Click an item in the preview to edit its individual properties.

✎ Item Properties
Click an item in the preview to select it.
👁 Live Preview
📋 Generated CSS

              
            

          


        


      

    

  


  
  

    

      
How It Works

      

        

          
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Visual Playground

          
See your flexbox layout update in real time as you adjust container properties. Colored child boxes move and resize instantly so you can understand exactly how each property works.

        

        

          
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Full Property Control

          
Configure every flexbox container property: flex-direction, flex-wrap, justify-content, align-items, align-content, and gap. All standard values are available in dropdown menus.

        

        

          
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Per-Item Settings

          
Click any item in the preview to edit its individual flex-grow, flex-shrink, flex-basis, order, and align-self properties. Fine-tune how each child behaves within the flex container.

        

        

          
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Production CSS

          
Get clean, copy-paste-ready CSS for both the container and individual items. One click copies everything to your clipboard, ready for your stylesheet.

        

      

    

  


  
  

    

      
Understanding CSS Flexbox Layout

      
CSS Flexbox is a powerful one-dimensional layout model designed for distributing space and aligning content within a container. Unlike older layout methods that rely on floats, tables, or inline-block, flexbox provides a clean, predictable way to arrange elements along a single axis -- either horizontally (row) or vertically (column).


      
Container Properties

      
The flex container is the parent element with display: flex. Its properties control the overall layout behavior: flex-direction sets the main axis, flex-wrap controls line wrapping, justify-content distributes space along the main axis, align-items aligns items on the cross axis, align-content distributes space between wrapped lines, and gap adds spacing between items.


      
Item Properties

      
Each direct child of a flex container is a flex item. Items can be individually configured with flex-grow (how much to grow relative to siblings), flex-shrink (how much to shrink), flex-basis (initial size before growing/shrinking), order (visual ordering), and align-self (overrides the container's align-items for that item).


      
Common Use Cases

      
    

  


  
  

    

      
Frequently Asked Questions

      


        

          

            What is CSS Flexbox?
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            CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model that distributes space among items in a container and aligns them. It works along a main axis (horizontal or vertical) and a cross axis. Flexbox simplifies complex layouts like centering, equal-height columns, and dynamic spacing without floats or positioning hacks.
          

        


        

          

            What is the difference between justify-content and align-items?
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            justify-content controls alignment along the main axis (the direction items flow, set by flex-direction). align-items controls alignment along the cross axis (perpendicular to the main axis). For a row layout, justify-content is horizontal and align-items is vertical. For a column layout, they swap.
          

        


        

          

            How do flex-grow, flex-shrink, and flex-basis work?
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            flex-grow determines how much an item should grow relative to others when extra space is available. flex-shrink determines how much an item should shrink when space is insufficient. flex-basis sets the initial size of an item before growing or shrinking. Together they control how flex items share available space.
          

        


        

          

            What does flex-wrap do?
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            flex-wrap controls whether flex items are forced onto a single line or can wrap onto multiple lines. 'nowrap' (default) keeps all items on one line, 'wrap' allows items to flow to the next line, and 'wrap-reverse' wraps items in reverse order. Wrapping is essential for responsive layouts.
          

        


        

          

            Can I use the generated CSS in production?
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            Yes. The generated CSS uses standard flexbox properties supported by all modern browsers including Chrome, Firefox, Safari, Edge, and mobile browsers. Flexbox has excellent browser support (97%+ globally). Simply copy the CSS code and paste it into your stylesheet.
          

        


        

          

            What is the order property in Flexbox?
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            The order property controls the visual order of flex items without changing the HTML source order. Items are laid out in ascending order value. The default is 0. Items with the same order value are laid out in source order. This is useful for reordering elements responsively.
          

        


      

    

  


  
  

    

      
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