Flexbox Generator
Flexbox Generator — Choose direction, wrapping, alignment and gap to preview a flex layout and copy its CSS. Processing runs in your browser.
Flexbox Generator generates CSS from the controls shown below. Choose direction, wrapping, alignment and gap to preview a flex layout and copy its CSS. Review the output before adding it to your page.
Flexbox Generator is a free CSS Tools utility that runs entirely in your browser — nothing you enter is uploaded.
How to use Flexbox Generator
- Choose Direction and Wrap for the flex container.
- Set Justify, Align and Gap to control item alignment and spacing.
- Review the sample items and generated flexbox declarations as you change the controls.
- Choose Copy and add the declarations to your flex container's CSS rule.
About this tool
The controls set flex-direction, flex-wrap, justify-content, align-items and gap on a sample container. The output styles the container; your own child content and item sizes determine its final layout.
The tool generates CSS locally from your chosen settings. It does not parse or modify a pasted stylesheet. Once the page and its scripts have loaded, generation can run without a network connection.
Frequently asked questions
What does Flexbox Generator do?
Choose direction, wrapping, alignment and gap to preview a flex layout and copy its CSS. The controls update the preview and CSS automatically.
Is Flexbox Generator free to use?
The tool is free to use and requires no account or installation. Controls are limited to the ranges and presets shown.
Where are my settings processed?
The tool processes your selected settings in your browser; it does not send those settings to a server for generation. The site privacy and cookie pages describe its separate advertising and analytics services.
How do I apply the generated CSS?
Put the generated declarations in the selector for your flex container, then add or style its child items to match your content.
Does Flexbox Generator work on mobile?
The controls work in modern desktop and mobile browsers with JavaScript enabled. Test the copied CSS in the browsers and layout you intend to support.