What this CSS flexbox generator (and CSS flex generator online) is for#
A CSS flexbox generator — also searched as a css flex generator or flexbox generator online — exists so you can see alignment and wrapping before you commit markup. Instead of tweaking justify-content blindly in DevTools, you dial direction, wrap, and gap, watch numbered boxes reflow, and copy a ready .flex-container { display: flex; … } block. This css flexbox maker keeps defaults familiar: row, nowrap, flex-start, stretch, and a modest gap — the fastest way to sketch a nav, button row, card strip, or form actions. When one child should grow into leftover space, select it and raise flex-grow without touching the others. Everything stays client-side: no upload, no account, just a playground that emits plain CSS you can drop into any project.
Direction, wrap, and the main vs cross axis#
flex-direction sets the main axis: row / row-reverse run horizontally; column / column-reverse stack vertically. justify-content distributes free space along that main axis (flex-start, center, space-between, space-around, space-evenly, flex-end). align-items controls how items sit on the cross axis in a single line (stretch, center, flex-start, and so on). When flex-wrap is wrap or wrap-reverse and items spill onto multiple lines, align-content packs those lines within the container — it has no visible effect while everything fits on one line. Gap uses the modern gap property (not the old grid-gap alias), with px, rem, or % so gutters match your design tokens.
Child flex: grow, shrink, basis, and align-self#
The shorthand flex: grow shrink basis is usually clearer than setting the three longhands alone. Defaults are 0 1 auto: items keep their content size, can shrink if needed, and do not grow into free space. Setting flex: 1 1 0 (or 1) makes siblings share free space evenly — a classic equal-width card row. flex-basis accepts auto, lengths, or percentages; invalid values in this tool fall back to auto. align-self overrides the container’s align-items for one child (for example pinning a badge to flex-end while siblings stretch). This generator only emits .item-N rules when a child differs from defaults, so your copied CSS stays short.
Responsive flexbox without a full drag-and-drop editor#
For a flexbox css generator responsive pattern, prefer flex-wrap: wrap plus flexible basis values (or flex: 1 1 12rem) so items reflow as the container narrows, then add media queries only when structure must change. People often search for a css flexbox generator drag and drop experience; this tool uses visual controls and click-to-select children instead of a full DnD surface — precise, keyboard-friendly, and enough for most navs and toolbars. Pair the copied CSS with your own breakpoints (flex-direction: column on small screens is a common move). The same output works in vanilla stylesheets, CSS Modules, or utility layers you map by hand.