CSS Flexbox Generator

Visually configure Flexbox container and item properties with a live preview. Copy the generated CSS instantly.

Last reviewed: April 2026
Reviewed by , software engineer · last updated April 2026

New to this tool? Click here for instructions

Click an item to edit its individual properties below.

Item 1 Properties

Generated CSS
Configure the Flexbox container above, then click items to adjust individual properties.

How to Use the Flexbox Generator

The CSS Flexbox Generator is a powerful tool that allows you to visually configure Flexbox container and item properties with a live preview. To use it, simply choose a flex-direction using the chips at the top (row, column, or reversed variants). Set container properties such as justify-content, align-items, flex-wrap, and gap to control how all items are arranged. Add or remove items using the buttons above the preview to see how the layout adapts. Click any item in the preview to select it and edit its individual flex-grow, flex-shrink, flex-basis, order, and align-self values. Copy or download the generated CSS for both the container and all items.

When to Use the Flexbox Generator

The Flexbox Generator is ideal for developers who need to quickly create and adjust CSS Flexbox layouts without writing extensive code. It's particularly useful for prototyping, debugging, and learning Flexbox concepts. Whether you're a beginner or an experienced developer, the visual interface makes it easier to understand and implement complex layouts.

How It Works

The Flexbox Generator uses a combination of HTML, CSS, and JavaScript to create a visual interface for configuring Flexbox layouts. When you make changes to the layout, the generator updates the preview in real-time, allowing you to see the effects of your changes immediately. The generated CSS can then be easily copied and used in your project.

Tips, Edge Cases, or Limitations

While the Flexbox Generator is a powerful tool, it's important to understand the underlying CSS Flexbox concepts to make the most of it. The generator can help you visualize and understand how Flexbox works, but it doesn't replace the need to learn and understand the properties and values involved. Additionally, the generator may not support all advanced Flexbox features, so it's still important to have a solid understanding of CSS Flexbox to tackle more complex layout challenges.

Frequently Asked Questions

justify-content controls alignment on the main axis, while align-items controls alignment on the cross axis.
flex-grow determines how much the item expands when extra space is available.
You can center an element with Flexbox by setting justify-content and align-items to center.
flex-basis sets the initial size before growing or shrinking.
Flexbox is ideal for one-dimensional layouts, while CSS Grid is better for two-dimensional layouts.

Quick reference

CSS Flexbox Generator Quick Reference
Property Value Description Example
display flex Enables flexbox layout for the container display: flex;
flex-direction row Arranges items in horizontal or vertical lines flex-direction: row;
justify-content center Aligns items along the main axis justify-content: center;
align-items stretch Aligns items along the cross axis align-items: stretch;
flex-wrap wrap Allows items to wrap into multiple lines flex-wrap: wrap;
gap 10px Creates space between flex items gap: 10px;

Example walk-through

Worked example: step-by-step

Step 1. Create an HTML structure with a container div and multiple child elements:

<div class="flex-container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
</div>

Step 2. Use the Flexbox Generator tool to apply styles to the container:

.flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}

Step 3. Adjust the generator's settings to modify properties like direction, wrap, and alignment.

Step 4. Observe the real-time transformation of child elements into a responsive, aligned layout.

Expected output: A horizontally arranged flex container with wrapped items, 1rem gaps, and space-between alignment.