Flexbox Generator is a free, browser-based tool built for developers and designers who want correct flexbox CSS without memorising every property name.
How to use the Flexbox Generator
- Choose a flex direction and wrap behaviour.
- Pick how items should be justified and aligned.
- Set a gap if you want spacing between items.
- Copy the generated .container CSS into your stylesheet.
Why use FreeToolsNets's Flexbox Generator?
- 100% free, with no usage limits and no account required.
- Everything runs locally in your browser — nothing you type is uploaded or stored on a server.
- Works on desktop, tablet and mobile in any modern browser.
- No installation, no plugins, and no ads blocking the tool itself.
- Part of FreeToolsNets's Website & SEO Tools collection.
Frequently asked questions
Does this show a live preview?
This generator outputs ready-to-use CSS; paste it into your project or a tool like CodePen to preview it live.
Do I need vendor prefixes?
No — flexbox is fully supported unprefixed in all modern browsers.
Is this tool free to use?
Yes, completely free on FreeToolsNets, with no sign-up and no limits.
Is my data sent to a server?
No. Everything runs locally in your browser using JavaScript — nothing you enter is uploaded anywhere.
Does it work on mobile?
Yes, the widget is fully responsive and works on phones, tablets and desktops.