Flexbox Builder
Visually build flexbox layouts and copy the CSS.
Controls
Preview
Generated CSS
About the Flexbox Builder
Experiment with flex-direction, wrap, justify-content, align-items, align-content, and gap using intuitive controls. See changes reflected instantly in a live preview grid of items, then copy the resulting CSS.
Examples
Centered row
row / center / centerOutput
.container { display: flex; justify-content: center; align-items: center; }Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Read more
- CSS generators that actually save time
Gradients, shadows, glassmorphism and layout builders are quick wins — if you know what to copy and what to write by hand.
- A practical guide to CSS Grid vs Flexbox
Both are layout systems, but they solve different problems. Here's how to decide which one fits, with real examples.
- CSS container queries vs media queries
Media queries respond to the viewport; container queries respond to the component's own box. When to use which, with working examples.
Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser