Web & SEO

Flexbox Generator — Free 2026

Visually build CSS flexbox layouts with a live preview. Adjust properties and copy production-ready CSS code instantly.

flex-direction

justify-content

align-items

flex-wrap

gap: 12px

Live Preview

Generated CSS

How It Works

Choose flex properties
Preview the layout
Copy the CSS

Understanding CSS Flexbox

CSS Flexbox is one of the most important layout tools in modern web development. Introduced in CSS3, it provides a way to lay out, align, and distribute space among items in a container, even when their sizes are unknown or dynamic. This visual generator lets you experiment with every flexbox property and see results instantly, then copy the CSS directly into your project.

Key Flexbox Properties

The flex-direction property defines the main axis: row (horizontal) or column (vertical). The justify-content property distributes space along the main axis, while align-items handles alignment on the cross axis. The flex-wrap property determines whether items wrap to new lines, and gap sets consistent spacing between items without margins. These five properties cover the vast majority of flexbox use cases.

Flexbox vs CSS Grid

Flexbox and Grid are complementary, not competing, layout systems. Flexbox is ideal for one-dimensional layouts — navigation bars, button groups, card rows, and form controls. CSS Grid excels at two-dimensional layouts where you need control over both rows and columns simultaneously. Many production layouts use both: Grid for the overall page structure and Flexbox for component-level arrangement. Try our CSS Grid generator for two-dimensional layouts, or explore the box shadow generator for adding depth to your elements.

Browser Support

Flexbox enjoys excellent browser support, with full compatibility in all modern browsers including Chrome, Firefox, Safari, Edge, and their mobile counterparts. The only exceptions are Internet Explorer 10-11, which support an older syntax with limited features. For new projects in 2026, flexbox can be used without any vendor prefixes or fallbacks.

Frequently Asked Questions

What is CSS Flexbox?

CSS Flexbox (Flexible Box Layout) is a one-dimensional layout method for arranging items in rows or columns. It provides powerful alignment and distribution capabilities, making it easier to design responsive layouts without float or positioning hacks.

What is the difference between justify-content and align-items?

justify-content controls alignment along the main axis (horizontal for row, vertical for column). align-items controls alignment along the cross axis. Together they give you full control over item placement within the flex container.

When should I use Flexbox vs CSS Grid?

Use Flexbox for one-dimensional layouts (a single row or column of items). Use CSS Grid for two-dimensional layouts (rows AND columns simultaneously). Flexbox excels at component-level layouts like navigation bars, card rows, and form controls.

What does flex-wrap do?

flex-wrap controls whether flex items are forced onto a single line or can wrap onto multiple lines. The default is nowrap. Setting it to wrap allows items to flow onto the next line when the container is too narrow, which is essential for responsive designs.