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CSS Flexbox Generator (Flex Layout Builder Online)

Build flex layouts interactively: direction, wrap, justify-content, align-items, gap, and child flex-grow. Generate copy-paste CSS for navbars, toolbars, centered content, and responsive rows.

Free online tool. No signup required. All processing runs in your browser.

.container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: stretch;
  align-content: stretch;
  gap: 0;
  row-gap: 0;
  column-gap: 0;
}

About this tool

Configure container and item properties visually and export display, flex-direction, flex-wrap, justify-content, align-items, align-content, gap, and common child rules like flex-grow and flex-basis.

What is CSS Flexbox Generator (Flex Layout Builder Online)?

Flexbox (display: flex) is a one-dimensional layout model for aligning and distributing space along a row or column. It excels at navigation bars, form toolbars, and vertically centering content.

How to use CSS Flexbox Generator (Flex Layout Builder Online)

  1. Set container direction (row/column) and whether items wrap.
  2. Choose main-axis and cross-axis alignment and optional gap between items.
  3. Adjust flex children (grow, shrink, basis) if needed, then copy the CSS.

Examples

Example input

Horizontal navbar, space-between, centered items

Example output

display: flex; flex-direction: row; justify-content: space-between; align-items: center; gap: 1rem;

FAQ

When should I use Flexbox vs CSS Grid?
Flexbox is ideal for one axis (rows of buttons, centering). Grid is better for two-dimensional templates (full page layouts).
Does gap replace margin hacks?
Yes. gap on flex containers gives consistent spacing without nth-child margin tricks in many layouts.
Are these tools free?
Yes. All tools on DevToolsHub are free to use.
Does the tool store my data?
No. Processing happens in your browser. We do not store or send your input to any server.
Can I use the output in production?
Yes. Use the result as you like; we do not claim any rights over the output.

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