CSS Flexbox Generator

Visual flexbox playground with live preview and generated CSS.

Last updated: September 2026

Processed on your device — never uploaded

flex-direction

flex-wrap

justify-content

align-items

gap: 10px

Child Items: 5

Customize Children

Preview

CSS Code

display: flex;
flex-direction: row;
flex-wrap: nowrap;
justify-content: flex-start;
align-items: stretch;
gap: 10px;

HTML + CSS

/* CSS */
.container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: stretch;
  gap: 10px;
}

<!-- HTML -->
<div class="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
</div>

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What is This Tool?

CSS Flexbox Generator is a free browser-based tool that lets you build flexbox layouts visually by adjusting properties like direction, wrap, justify-content, align-items, and gap. It processes everything locally in your browser using JavaScript, so your data never leaves your device. No sign-up, no installation, and no server uploads required — just open the tool and start using it immediately.

How to Use This Tool

Use the visual controls (sliders, color pickers, toggles) to design your effect.
See the live preview update in real time as you adjust settings.
Review the generated CSS code in the code panel below.
Click Copy CSS to paste the code directly into your stylesheet.

When to Use This Tool

This tool is particularly useful when creating responsive navigation bars, card grids, centering elements, and flexible page layouts. Since it runs entirely in your browser, it works offline after the page loads and keeps your data completely private. Whether you are a developer, designer, student, or professional, this web development tool saves time and eliminates the need for desktop software installation.

Tips and Best Practices

Copy the generated CSS directly into your project stylesheet — it is production-ready.
Test the effect in multiple browsers since some CSS properties have varying support.
Combine multiple generators (e.g., gradient + box-shadow) for layered visual effects.
Use CSS custom properties (variables) to make generated values easy to update later.
All code generation happens in your browser — no external dependencies required.

Frequently Asked Questions

What is CSS Flexbox used for?

CSS Flexbox is a one-dimensional layout model for distributing space and aligning items in a container, making it ideal for navigation bars, card layouts, and centering content.

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

justify-content controls spacing along the main axis (horizontal by default), while align-items controls alignment along the cross axis (vertical by default).

When should I use Flexbox vs CSS Grid?

Use Flexbox for one-dimensional layouts (a single row or column) and CSS Grid for two-dimensional layouts where you need control over both rows and columns simultaneously.

What does flex-wrap do?

flex-wrap controls whether flex items are forced onto a single line or can wrap onto multiple lines when they overflow the container.

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/* CSS */ .container { display: flex; flex-direction: row; flex-wrap: nowrap; justify-content: flex-start; align-items: stretch; gap: 10px; }  <div class="container"> <div class="item">1</div> <div class="item">2</div> <div class="item">3</div> <div class="item">4</div> <div class="item">5</div> </div>

What is This Tool?

When to Use This Tool

Tips and Best Practices

Copy the generated CSS directly into your project stylesheet — it is production-ready.

Test the effect in multiple browsers since some CSS properties have varying support.

Combine multiple generators (e.g., gradient + box-shadow) for layered visual effects.

Use CSS custom properties (variables) to make generated values easy to update later.

All code generation happens in your browser — no external dependencies required.

Frequently Asked Questions

What is CSS Flexbox used for?

CSS Flexbox is a one-dimensional layout model for distributing space and aligning items in a container, making it ideal for navigation bars, card layouts, and centering content.

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

justify-content controls spacing along the main axis (horizontal by default), while align-items controls alignment along the cross axis (vertical by default).

When should I use Flexbox vs CSS Grid?

Use Flexbox for one-dimensional layouts (a single row or column) and CSS Grid for two-dimensional layouts where you need control over both rows and columns simultaneously.

What does flex-wrap do?

flex-wrap controls whether flex items are forced onto a single line or can wrap onto multiple lines when they overflow the container.

CSS Flexbox Generator

What is This Tool?

How to Use This Tool

When to Use This Tool

Tips and Best Practices

Frequently Asked Questions

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Get Tool Tips & Updates

CSS Flexbox Generator

What is This Tool?

How to Use This Tool

When to Use This Tool

Tips and Best Practices

Frequently Asked Questions

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Get Tool Tips & Updates