CSS Flexbox Generator

Design flexible layouts visually and instantly copy the generated CSS code.

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styles.css
.flex-container {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: stretch;
  flex-wrap: nowrap;
  gap: 16px;
}

Overview

Welcome to the ultimate CSS Flexbox Generator! If you are a frontend developer, web designer, or student learning CSS, you know that mastering the Flexible Box Module (Flexbox) is essential for modern web development. However, remembering exactly how properties like justify-content, align-items, and flex-wrap interact with each other can be confusing and time-consuming. That is exactly why we built this interactive, highly visual Flexbox playground. Our tool allows you to instantly visualize how different CSS properties affect your layout in real-time, completely eliminating the need to guess and check your code in the browser.

Our visual builder features a fully responsive container with adjustable child elements. Using intuitive dropdowns and toggle switches, you can experiment with every single core Flexbox property. Want to see how space-between differs from space-around? Just click the button and watch the boxes instantly rearrange themselves. Need to build a complex nested layout with a specific gap and flex-direction? Dial in your settings, and the tool will automatically generate the exact, production-ready CSS code below the preview. Whether you are building a simple navigation bar, a responsive card grid, or centering a div, our Flexbox Generator makes it incredibly easy, fast, and educational.

Key Features

Interactive Visualizer: See your layout changes happen instantly in a real-time preview box.
Comprehensive Controls: Full support for all container properties including flex-direction, justify-content, align-items, flex-wrap, and align-content.
Gap Property Support: Easily adjust the gap (spacing) between flex items with a slider, perfectly visualizing modern CSS spacing.
Dynamic Child Elements: Add or remove flex items (boxes) on the fly to see how your layout handles overflowing content.
Auto-Generated Code: Generates clean, perfectly formatted, production-ready CSS code matching your visual settings.
1-Click Copy: Copy the generated CSS directly to your clipboard to paste into your stylesheet or Tailwind config.
100% Client-Side: Fast, private, and secure. Runs entirely in your browser with zero latency or server requests.

How to Use CSS Flexbox Generator

1Adjust Container Properties: Use the dropdown menus to change the Flex Direction (row, column) and Flex Wrap behavior.
2Set Alignment: Experiment with Justify Content (main axis alignment) and Align Items (cross axis alignment) to position the boxes.
3Add or Remove Items: Click the '+' or '-' buttons to change the number of child boxes inside the flex container.
4Adjust Gap: Use the slider to increase or decrease the spacing between the items.
5Copy CSS Code: Once you have achieved the perfect visual layout, scroll down to the code block and click the Copy button.
6Paste into Project: Paste the generated CSS class into your project's stylesheet, or use the visual logic to write your Tailwind classes.

Benefits

  • Learn by Doing: Visualizing Flexbox is the fastest and most effective way to truly understand how the CSS module works.
  • Save Development Time: Stop writing CSS, saving, refreshing the browser, and guessing. Build the layout visually in seconds.
  • Never Center a Div Blindly Again: The age-old joke of 'how to center a div' is solved instantly. Just set justify-content and align-items to 'center'.
  • Perfect for Prototypes: Rapidly prototype responsive layouts and component structures before committing them to code.
  • Completely Free: No premium tiers, no required logins, and no hidden fees.

Common Use Cases

Beginner Learning CSS

A student is struggling to understand the difference between 'align-items' and 'align-content'. They open the generator, add multiple rows of boxes using 'flex-wrap', and toggle the two properties. Seeing the boxes shift visually instantly clicks in their brain, saving them hours of reading documentation.

Frontend Dev Building a Nav Bar

A developer needs to build a responsive navigation bar where the logo is on the far left and the links are on the far right. They use the tool, set Flex Direction to 'row', and set Justify Content to 'space-between'. They copy the resulting CSS and paste it directly into their React component.

UI Designer Prototyping a Grid

A designer wants to see how a photo gallery will look if the images wrap to a new line when the screen gets smaller. They add 10 boxes, turn on 'flex-wrap', and adjust the 'gap' slider to 16px. They then hand off the exact CSS logic to their development team.

Tips & Best Practices

  • Understand the Main Axis: Remember that changing the 'flex-direction' from 'row' to 'column' swaps the Main Axis and the Cross Axis. This means 'justify-content' will now control vertical alignment instead of horizontal!
  • Use Gap Instead of Margins: Modern Flexbox supports the 'gap' property, which is much cleaner than adding margins to individual child items.
  • Wrap Your Content: Always test your layouts with 'flex-wrap: wrap' turned on if you expect to have a lot of child elements on a small screen.
  • Center Anything: To perfectly center an element inside a container, set the container to display: flex, justify-content: center, and align-items: center.
  • Inspect the Code: Don't just copy the code—read it! Our generator outputs clean CSS so you can study exactly what properties achieve the visual result.