CSS Flexbox Generator — Build Layouts Visually in Seconds

About Flex Box Generator

Welcome to the Flexbox Layout Generator! This interactive tool helps you understand and experiment with CSS Flexbox properties in real-time.

Use the control panel to adjust various Flexbox properties like direction, justification, alignment, and more. Watch as your changes are instantly reflected in the preview panel, and get the generated CSS code ready to use in your projects.

CONTROLS

FLEX-DIRECTION

FLEX-ITEMS

JUSTIFY-CONTENT

ALIGN-ITEMS

FLEX-WRAP

FLEX-GROW

FLEX-BASIS

CODE

PREVIEW

How to Use the Flexbox Generator

Get started in seconds — no signup required. Just adjust, preview, and copy.

Choose Properties

Select flex-direction, justify-content, align-items, and other CSS flexbox properties from the control panel.

Add Flex Items

Use the increment and decrement buttons to add or remove flex items and see how they behave in the container.

Preview Live

Watch your flexbox layout update in real-time as you change properties. Experiment freely with different combinations.

Copy the CSS

Grab the generated CSS code from the code panel and paste it directly into your project. Ready to use.

Why Use Our Flexbox Generator?

The fastest way to learn, experiment, and generate production-ready flexbox CSS.

Real-Time Visual Preview

See your flexbox layout update instantly as you change properties. No need to switch between code and browser.

Production-Ready CSS

Generate clean, valid CSS code you can copy and paste directly into your project. No frameworks required.

Learn by Doing

Understand how each flexbox property works by experimenting with interactive controls and seeing immediate results.

Works on Any Device

Use the generator on desktop, tablet, or mobile. The responsive interface adapts to your screen size.

No Signup Required

Start building flexbox layouts immediately. Completely free, no account needed, no limitations.

18+ Real Examples

Browse real-world layout examples including navbars, card grids, hero sections, dashboards, and more.

Frequently Asked Questions

Quick answers to common CSS Flexbox questions.

What is CSS Flexbox?

CSS Flexbox (Flexible Box Layout) is a one-dimensional CSS layout model designed for arranging items in rows or columns. It makes it easy to distribute space and align content within a container, even when item sizes are unknown or dynamic. Flexbox is supported by all modern browsers.

When should I use Flexbox vs CSS Grid?

Use Flexbox for one-dimensional layouts — when you need to arrange items in a single row or column. Use CSS Grid for two-dimensional layouts where you need control over both rows and columns simultaneously. Many layouts combine both: Grid for the overall page structure, and Flexbox for component-level alignment.

How do I center a div with Flexbox?

Set the parent container to display: flex, then use justify-content: center for horizontal centering and align-items: center for vertical centering. This is the most reliable way to center content in CSS.

What does flex-grow do?

The flex-grow property controls how much a flex item should grow relative to other items when extra space is available in the container. A value of 0 means the item won't grow, while higher values make items take up proportionally more space.

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

justify-content aligns items along the main axis (horizontal by default), while align-items aligns items along the cross axis (vertical by default). When you change flex-direction to column, these axes swap.

Is Flexbox supported in all browsers?

Yes, CSS Flexbox is supported in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. It has had full support since around 2015, making it safe to use in production without vendor prefixes.

How do I make a responsive layout with Flexbox?

Use flex-wrap: wrap to allow items to wrap to the next line, combine with flex-basis to set initial item widths, and use media queries to adjust flex properties at different breakpoints. Our examples section shows many responsive patterns.

What is flex-basis?

The flex-basis property sets the initial main size of a flex item before free space is distributed. It can be a fixed value (like 200px), a percentage (like 50%), or auto which uses the item's content size. It works together with flex-grow and flex-shrink to determine final item sizes.

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Ready to Master Flexbox?

Explore real-world examples, read our comprehensive documentation, or jump back to the generator and start building.

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