Generator Tools

CSS Flexbox Generator

Build CSS flexbox layouts visually with live preview, presets, per-item controls, and copy-ready CSS, HTML, and Tailwind output.

Quick presets

Live preview

Height240px

Click any item in the preview to edit its individual flex properties below.

Container properties

Apply to the parent element with display: flex.

flex-direction

flex-wrap

justify-contentAlignment along the main axis

align-itemsAlignment along the cross axis

align-contentCross-axis spacing for wrapped lines (only when flex-wrap is on)

gap12px

Items

Add up to 8 items, then click an item in the preview or the chip below to edit its flex properties.

3 / 8

flex-grow0

Share of free space this item claims

flex-shrink1

How much this item shrinks when space is tight

order0

Visual position; lower numbers come first

align-selfOverride the container's align-items for this item

flex-basisInitial main-size; auto, content, or a CSS length

CSS

.container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: stretch;
  gap: 12px;
}

Per-item rules are emitted only when their values diverge from the CSS defaults.

HTML

<div class="container">
  <div class="item">Item 1</div>
  <div class="item">Item 2</div>
  <div class="item">Item 3</div>
</div>

Tailwind v3+

flex flex-row flex-nowrap justify-start items-stretch gap-[12px]

Tailwind output covers the container only. Per-item overrides need their own utility classes.

Full snippet

How to use

Pick a preset (navbar, centered hero, card grid, sidebar + main, footer columns, vertical stack) for a quick start, or skip presets and configure the container directly.
Set the container properties: flex-direction, flex-wrap, justify-content, align-items, align-content (active when wrap is on), and gap.
Add up to eight items. Click any item in the preview or the chip below to select it.
Edit the selected item's flex-grow, flex-shrink, flex-basis, order, and align-self. Use the basis chips for common values (auto, 0, 100px, 50%).
Watch the preview update in real time. The container uses the same CSS values the tool will copy.
Copy the CSS, the HTML scaffold, the Tailwind class, or the full snippet. Paste into your project and you are done.

About this tool

CSS Flexbox Generator gives you a visual editor for the CSS Flexible Box Layout module and emits the exact code you can paste into a stylesheet. Adjust flex-direction, flex-wrap, justify-content, align-items, align-content, and gap on the parent container, and tune flex-grow, flex-shrink, flex-basis, order, and align-self on each individual item. The live preview is a real flex container styled with the same property values the tool will copy, so what you see is exactly what your browser will render in production. Click any item in the preview to select it and edit its overrides; the generated CSS only includes per-item rules when their values diverge from the spec defaults, so the output stays as compact as your configuration warrants. Built-in presets cover the layouts developers actually build (navbar, centered hero, card grid, sidebar plus main, footer columns, and vertical stack) and each preset is a single click. Output is provided three ways: a clean CSS block (container plus item overrides), a matching HTML scaffold so you can drop the result into any project unchanged, and a Tailwind v3+ class string for codebases on Tailwind. Use it to learn flexbox by experimenting, to prototype a layout before writing any code, to debug the difference between justify-content and align-items, or to ship a polished layout without re-deriving the syntax from memory. Everything runs locally in the browser, so the layout values you tune never leave your device.

Free to use. Works in your browser. No signup, no login.

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CSS Flexbox Generator

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