Flexbox CSS Generator

Visual flexbox generator with live preview

Generate flexbox CSS layouts visually with real-time preview. Perfect for developers learning flexbox, AI builders creating layouts, and no-code creators styling custom components.

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Visual Preview

See flexbox changes instantly

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Copy CSS

One-click CSS copying

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Responsive

Mobile and desktop previews

Flexbox Properties

Common Layouts

Live Preview

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Generated CSS

CSS Class

.flex-container {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: stretch;
  flex-wrap: nowrap;
  gap: 8px;
}

Inline Styles

display: flex; flex-direction: row; justify-content: flex-start; align-items: stretch; flex-wrap: nowrap; gap: 8px;

Flexbox Tips

Main Axis vs Cross Axis

justify-content controls main axis alignment, align-items controls cross axis. The main axis changes with flex-direction.

When to Use Wrap

Use flex-wrap: wrap for responsive layouts where items should wrap to new lines. Then use align-content to control wrapped line spacing.

Gap vs Margins

The gap property is cleaner than margins for spacing flex items. It only adds space between items, not around the container edges.

Responsive Design

Use flex-direction: column on mobile and flex-direction: row on desktop with CSS media queries for responsive layouts.

Perfect for Modern Builders

Developer Layouts

Rapidly prototype flex layouts without syntax lookup

💡 Build navigation bars, card grids, and responsive components

AI Workflow Integration

Generate CSS for AI-powered design tools and prompts

💡 Copy-paste flexbox CSS into ChatGPT or Claude for further customization

No-Code Styling

Create custom CSS for Bubble, Webflow, and other platforms

💡 Generate flex layouts for custom components in no-code builders

How It Works

Step-by-Step Process

1Use interactive controls to set flex-direction, justify-content, align-items, and more
2See your layout changes instantly with visual flex items and responsive previews
3Get clean, optimized CSS code ready to use in your projects

Flexbox Properties & Best Practices

  • Flex Direction: Use row for horizontal layouts, column for vertical. Add -reverse to flip the order without changing HTML structure.
  • Justify vs Align: justify-content controls main axis alignment, align-items controls cross axis. Use center for both to perfectly center content.
  • Responsive Flex: Use flex-wrap: wrap for responsive layouts. Set flex: 1 for equal-width items, or flex-basis for specific sizing.
  • Common Patterns: Navigation bars use space-between, card layouts use flex-wrap, and centering uses justify-content: center; align-items: center.

Frequently Asked Questions

What types of tools does BuilderTools.dev offer?

We provide specialized micro-tools for data conversion, AI development, CSS calculations, API cost estimation, and project planning. All tools are designed to work seamlessly with modern development workflows including AI-assisted building and no-code platforms.

Are BuilderTools.dev tools free to use?

Yes! All our basic tools are completely free with no registration required. We're building premium features for power users, but our core mission is providing essential utilities that every builder can access instantly.

How do these tools help with AI-assisted development?

Our tools are optimized for AI workflows. Convert data to AI-friendly formats, estimate API costs before building, validate AI outputs, and handle technical calculations while you focus on prompting and creating.

Can I integrate BuilderTools with my existing workflow?

Absolutely! Our tools work great with ChatGPT, Claude, Zapier, Make, Bubble, Webflow, and traditional development environments. Copy-paste results anywhere or use our upcoming API for programmatic access.