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Flexbox Generator

Build flexbox layouts visually by choosing flex-direction, justify-content, align-items, flex-wrap and gap. Preview with any number of items and copy the matching CSS.

Last updated: 2026/10/16 Design Feedback & bug reports

Container Properties

12px
4
Preview
CSS Output 

            

        


    




    
    



    
How to Use

    

        

            
1

            

                
Choose Properties

                
Pick the flex-direction, justify-content, align-items and flex-wrap options that match the layout you want.

            

        

        

            
2

            

                
Adjust Gap & Item Count

                
Use the gap slider and change the number of items while checking the layout in the live preview.

            

        

        

            
3

            

                
Copy the CSS

                
Copy the generated CSS with the copy button and paste it straight into your stylesheet.

            

        

    






    

        

            
About Flexbox

            
Flexbox (Flexible Box Layout) is a CSS layout method for arranging elements flexibly along a row or column. This tool lets you control the main flexbox properties with buttons and sliders, preview the result in real time, and output ready-to-use CSS. All processing runs in your browser and nothing you enter is sent to a server.

        

        

            
Features

            
    
                
  • All Key PropertiesSwitch flex-direction, justify-content, align-items, flex-wrap and gap with a single click.
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  • Real-time PreviewChanges are reflected instantly in the preview, and you can freely add or remove items.
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  • Copy-ready CSSGenerates the container CSS automatically so you can copy and paste it into your project.
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  • Privacy ProtectedAll processing happens in your browser. No data is sent to servers.
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Use Cases

            
    
                
  • Horizontal navigation bars and toolbars
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  • Card galleries with even spacing
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  • Centering buttons and icons
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  • Aligning form labels and inputs
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  • Learning or teaching how flexbox behaves
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FAQ

    

        
Is the Flexbox Generator free to use?
Yes, it is completely free. No registration required. Just open it in your browser and start using it.

        
Can I copy and use the generated CSS directly?
Yes. Use the copy button to copy the CSS to your clipboard and paste it into your stylesheet. The output is the CSS you apply to the container element.

        
What is the difference between justify-content and align-items?
justify-content aligns items along the main axis (the direction set by flex-direction), while align-items aligns them along the cross axis (perpendicular to the main axis). With flex-direction: row the main axis is horizontal; with column it is vertical.

        
Is the gap property supported in all browsers?
The flexbox gap property is fully supported in all modern browsers (Chrome, Firefox, Safari, Edge) as of 2026. For very old environments, consider using margins instead.

        
Is my data sent to a server?
No. Layout generation and CSS output are all handled locally in your browser with JavaScript. No data is sent to any external server, so you can use it with peace of mind.

    













    
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Related Guides

    

                
            
                CSS Flexbox for Beginners: Main vs Cross Axis, justify-content, align-items
                Learn CSS Flexbox from the ground up: how display:flex works, the main and cross axes, flex-direction, justify-content, align-items, flex-wrap, the roles of flex-grow/shrink/basis, common layouts like centering and even spacing, and how it differs from Grid.