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CSS Flexbox Generator — Visual Layout Builder

Generate CSS flexbox layouts visually: flex-direction, justify-content, align-items, wrap and gap with a live preview. Copy-ready CSS, free, no signup.

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

Build flexbox layouts without guessing

Flexbox is the modern way to arrange items in a row or column and control spacing and alignment. Set flex-direction, justify-content, align-items, wrapping and gap — watch the live preview and copy the CSS.

The two axes

justify-content aligns items along the main axis (horizontal for row); align-items aligns them along the cross axis. Switching flex-direction to column swaps which is which — the #1 thing that trips people up. Great for navbars, card rows, centering and toolbars.

How to use the CSS Flexbox Generator

Takes about a minute. No signup, no download, your data stays in your browser.

  1. 1
    Open the tool. Scroll up to the CSS Flexbox Generator above — it loads instantly in your browser, no install needed.
  2. 2
    Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
  3. 3
    Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.

Frequently asked questions

Common questions about the CSS Flexbox Generator.

How do I center a div with flexbox?

Set the container to display:flex with justify-content:center and align-items:center — that centers children on both axes.

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

justify-content spaces items along the main axis; align-items aligns them on the cross axis. flex-direction decides which axis is which.

How do I space items evenly?

Use justify-content: space-between, space-around or space-evenly.

What does the gap property do?

gap adds consistent spacing between flex items without needing margins.

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