CSS Flexbox & Grid Generator Online Free
Build CSS Flexbox and Grid layouts visually with real-time preview. Adjust all properties with toggles and sliders, then copy the ready-to-use CSS — no signup needed.
How to Use the CSS Layout Generator
- Choose Flexbox or Grid — select your layout model from the top tabs.
- Pick a preset or customize — start with Holy Grail, Card Grid, Nav Bar, or any other preset.
- Adjust the controls — use toggles and sliders to change direction, wrapping, alignment, columns, and gap.
- See the live preview — colored boxes update instantly as you change settings.
- Copy or download — copy the CSS or download it as a
.cssfile.
Features
- ✓ Flexbox and CSS Grid support
- ✓ 7 common layout presets
- ✓ Live colored item preview
- ✓ All justify/align properties covered
- ✓ Custom grid-template-columns string
- ✓ Adjustable gap, items, and row height
- ✓ Copy CSS to clipboard
- ✓ Download as .css file
- ✓ Dark mode friendly
- ✓ Runs entirely in the browser
Quick Flexbox & Grid Reference
Flexbox container properties
display: flex— enable flexboxflex-direction— row, column, reverseflex-wrap— nowrap, wrap, wrap-reversejustify-content— main-axis alignmentalign-items— cross-axis alignmentgap— spacing between items
CSS Grid container properties
display: grid— enable gridgrid-template-columns— column track sizesgrid-auto-rows— implicit row heightscolumn-gap / row-gap— guttersjustify-items— inline alignment per cellalign-items— block alignment per cell