Flexbox Layout Generator
Configure flex-direction, justify-content, align-items, flex-wrap and gap visually, preview the layout live and copy the resulting CSS with one click.
FreeOnline Tool
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How to Use
Set the options below one by one and the preview area on the right shows how four boxes arrange themselves in real time, while the code box underneath generates the matching CSS:
- flex-direction: pick the main axis direction — row, row-reverse, column or column-reverse.
- justify-content: set alignment along the main axis, with flex-start, flex-end, center, space-between, space-around and space-evenly available.
- align-items: set alignment along the cross axis, with stretch, flex-start, flex-end, center and baseline available.
- flex-wrap: control wrapping with nowrap, wrap or wrap-reverse.
- gap: enter a pixel value for the spacing between children.
When you are happy with the result, click "Copy CSS" to copy the generated .container rule to your clipboard and paste it straight into your project stylesheet.
Features
This is a purely client-side visual generator for Flexbox layouts. Instead of memorizing property names and values, you build common flexible layouts through dropdowns and a number input.
- The preview renders four numbered boxes live, showing exactly how flex-direction, justify-content, align-items, flex-wrap and gap combine.
- The code box below stays in sync, producing a formatted
.container { display: flex; ... }CSS block. - One-click copy puts the code straight on the clipboard, with no manual text selection.
- Everything runs locally in your browser and no data is uploaded.
Use Cases
Front-end debugging
Try different flex property combinations quickly without editing code and refreshing the page over and over.
Building common layouts
Find the right justify-content and align-items combination for navigation bars, card lists and similar patterns.
Learning Flexbox
Beginners can build real intuition for what each Flexbox property does by watching the live preview.
Keeping a team consistent
Agree on one CSS approach for a layout module and reuse the generated code across the team.
FAQ
Can the generated CSS be used in production?
Yes. The tool outputs standard flex layout CSS that works in every modern browser, so you can paste it straight into your project stylesheet.
Why does the preview only show four boxes?
Four boxes are enough to demonstrate how justify-content, align-items and the other properties behave, and the number of boxes has no effect on the CSS that gets generated.
Is the gap property supported everywhere?
gap is supported in all current mainstream browsers (Chrome 84+, Firefox 63+, Safari 14.1+). If you must support much older browsers, simulate the spacing with margins instead.
Does the tool save my configuration?
No. Your settings live only in the current page's memory and revert to the defaults when you refresh. Nothing is uploaded or stored.