How to Build a CSS Flexbox layout

Build Flexbox layouts visually. Experiment with flex-direction, justify-content, align-items, and more. Preview in real time and copy production-ready CSS.

4 min read CSS Flexbox Generator Free, no signup required

Quick start

CSS Flexbox Generator — Build Flexbox layouts visually.

Get started in under two minutes:

Set the flex container direction
Adjust alignment settings
Add and configure flex items
Copy the generated CSS

Open CSS Flexbox Generator

Step-by-step instructions

Follow these steps to get the best results from CSS Flexbox Generator:

Set the flex container direction

Click the "Flex Direction" buttons (Row, Row Reverse, Column, Column Reverse) to set whether items are arranged horizontally or vertically.

Tip: Row is the default — items sit side by side. Column stacks them vertically.

Adjust alignment settings

Use "Justify Content" to control spacing along the main axis (space-between, center, flex-end, etc.). Use "Align Items" to control cross-axis alignment (stretch, center, baseline).

Tip: To center an element both horizontally and vertically, set both justify-content and align-items to center.

Add and configure flex items

Click "Add Item" to insert child elements. Click any item in the preview to select it and set its flex-grow, flex-shrink, flex-basis, align-self, and order values.

Tip: flex-grow: 1 on all items makes them share available space equally.

Copy the generated CSS

Click "Copy Container CSS" to copy the parent styles, or "Copy All CSS" to get both container and item styles in one block ready to paste into your stylesheet.

Tip: The generated CSS uses standard properties — no browser prefixes needed for modern browsers.

Open CSS Flexbox Generator

Frequently asked questions

Is CSS Flexbox Generator free to use?

Yes — CSS Flexbox Generator is completely free with no account or signup required. All core features are available immediately.

Do I need vendor prefixes in the generated CSS?

No. The generated CSS uses standard properties that work in all modern browsers without vendor prefixes. If you need to support very old browsers, you may need to add fallbacks manually.

Does CSS Flexbox Generator work on mobile devices?

Yes — CSS Flexbox Generator works on smartphones and tablets through any modern mobile browser. The interface adapts to smaller screens automatically.