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Flexbox Generator

Build a flex container rule visually and copy the finished CSS in one click.

Build a flex container

Item 1
Item 2
Item 3
Item 4
Container class: .flex-container · items: 4
The preview uses exactly the declarations that are written into the CSS box.

How to use the Flexbox Generator

  1. Pick the flex-direction, wrapping, alignment and gap you want.
  2. Watch the preview boxes rearrange as you change each control.
  3. Press Copy CSS and paste the generated rule into your stylesheet.

Features

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Frequently Asked Questions

Common questions about the free online flexbox generator.

It writes a flex container rule for you. Choose the direction, wrapping, alignment and gap, then copy the finished CSS.
Press Copy CSS, paste the rule into your stylesheet and rename the container class to match your own markup.
justify-content positions items along the main axis, while align-items positions them along the cross axis of the container.
It lets items move onto a new line when they no longer fit, instead of shrinking to squeeze into a single line.
Yes. Every control updates the preview box and the generated CSS straight away, so you can see the effect of each value.
Yes. The tool only writes standard flexbox properties that work in every modern browser, and the preview uses the same values.
No. The generator is free, needs no sign-up and runs entirely in your browser with no uploads and no tracking.
Yes. Paste the rule into any project, whether you write plain CSS, a preprocessor or a framework with custom styles.

Last updated: October 10, 2026