CSS Flexbox Generator

Build flexbox layouts visually and copy the CSS. No sign-up required.

Container Properties
Configure the flex container settings.
Preview
Live preview of your flexbox layout.
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Generated CSS
Copy and paste into your stylesheet.
.container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: stretch;
  gap: 8px;
}

About the CSS Flexbox Generator — Visual Flexbox Builder

Flexbox is the foundation of modern CSS layouts, but remembering the interaction between flex-direction, justify-content, align-items, and flex-wrap can be tricky — especially when changing direction swaps the main and cross axes. This visual generator lets you toggle every container property and immediately see how items rearrange in a live preview. When the layout looks right, copy the generated CSS and paste it into your stylesheet. The tool covers all standard flex container properties including gap, which is now supported in all modern browsers.

Common use cases

Why client-side?

Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.

Want more? Browse all tools or visit the ToolsVault blog for practical guides.

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Frequently Asked Questions

How do I use the CSS flexbox generator?
Click the property buttons to set flex-direction, justify-content, align-items, flex-wrap, and gap. The preview updates live, and the generated CSS code is ready to copy.
Does this generate responsive CSS?
The tool generates the flex container properties. You can combine the output with media queries in your stylesheet for responsive behavior.
What is 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 (the perpendicular direction).
Is gap supported in flexbox?
Yes. The gap property is supported in flexbox in all modern browsers (Chrome 84+, Firefox 63+, Safari 14.1+, Edge 84+). It adds consistent spacing between flex items without needing margins.