Flexbox Generator

What is Flexbox Generator?

Flexbox Generator creates CSS Flexbox layouts through a visual drag-and-drop interface that generates clean, production-ready CSS code in real-time. It covers all flex container properties (display, flex-direction, flex-wrap, justify-content, align-items, align-content, gap) and flex item properties (order, flex-grow, flex-shrink, flex-basis, align-self). The tool provides a live preview with resizable containers to test responsive behavior, and explains how each property affects the layout with visual annotations.

Frontend developers building responsive layouts, CSS beginners learning Flexbox visually, and UI designers prototyping component arrangements. The tool runs entirely in your browser — your data never leaves your device.

How to Use Flexbox Generator

1. Set the container flex properties — direction, wrap, justify-content, and align-items
2. Add child elements and configure their flex-grow, flex-shrink, and flex-basis values
3. Drag the container edges to test how the layout responds at different widths
4. Copy the generated CSS for both the container and items into your stylesheet

Common Use Cases

• Building navigation bar layouts with proper spacing and alignment using Flexbox
• Creating responsive card grids that wrap and redistribute space across breakpoints
• Centering elements both horizontally and vertically — the classic CSS centering problem
• Prototyping complex flex layouts visually before writing any code

Pro Tips

• The shorthand 'flex: 1' is equivalent to 'flex: 1 1 0%' (grow: 1, shrink: 1, basis: 0%) — it makes items share space equally; 'flex: auto' (1 1 auto) distributes extra space proportionally to content size instead
• Use 'gap' instead of margins between flex items — it only applies between items (not before the first or after the last) and avoids the negative-margin hacks that were necessary before gap was supported
• flex-basis takes priority over width/height on the main axis — if you set both, flex-basis wins; use 'auto' for flex-basis to fall back to the width/height value

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: CSS Flexbox, CSS Grid, Responsive layout, Box alignment.

Frequently Asked Questions