// LIVE PREVIEW
// SELECTED ITEM
Click an item in the preview
No item selected
// GENERATED CSS
// build flexbox layouts visually
Build Flexbox layouts visually with a live preview. Adjust container and item properties, add/remove items, then copy clean CSS — no signup needed.
Adjust flex-direction, justify-content, align-items, gap and more from the top control bar.
Click "+ ADD ITEM" to add flex children. Click any item in the preview to select it and tweak its individual properties.
The generated CSS updates in real time. Copy it to clipboard or download as a .css file with one click.
The CSS Flexbox Generator is a visual, browser-based tool that lets you configure a flex container and its children through dropdowns and sliders. Every change updates the live preview and the generated CSS simultaneously — no manual coding needed.
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model that lets you distribute space and align items inside a container along a single axis — either horizontal or vertical.
flex-grow defines how much a flex item should grow relative to the others when extra space is available. A value of 1 means it takes up a proportional share of the remaining space.
align-items aligns items within a single line. align-content aligns multiple lines of items when flex-wrap causes wrapping — it has no effect on single-line containers.
Yes. The generated CSS is fully free to copy or download. No account, no watermark, no limits — just clean code you can paste straight into your project.
flex-shrink defines how much an item should shrink relative to others when the container is too small. A value of 0 prevents the item from shrinking at all.
The preview uses real CSS Flexbox rendered by your browser, so it is 100% accurate. What you see is exactly what the generated CSS will produce in a real project.
Flexbox is the go-to CSS tool for one-dimensional layouts. Whether you're centering a button, distributing nav links, or stacking cards, Flexbox handles it with minimal code. This generator removes the guesswork: adjust a dropdown and see the result instantly.
Flexbox has two groups of properties. Container properties (display: flex, flex-direction, justify-content, align-items, flex-wrap, gap) control how children are laid out. Item properties (flex-grow, flex-shrink, flex-basis, align-self, order) override or extend those rules for individual children.
justify-content: center + align-items: centerjustify-content: space-betweenflex-grow: 1 on every childflex-grow: 0 on sidebar, flex-grow: 1 on main