CSS Layout Tools
Visual playgrounds for Flexbox, Grid, spacing, and aspect-ratio. Output is CSS you paste into a project.
7 tools · 100% browser-based · No uploads · No signup
About these CSS Layout tools
Layout tools are visual playgrounds for Flexbox, Grid, masonry-style columns, media queries, positioning and z-index, spacing, and aspect-ratio. They exist because flex and grid are easier to learn by dragging than by memorizing every alignment keyword.
The generated CSS is a starting point. Real pages add wrapping, container queries, and design-system constraints these demos do not know about.
Tools in this category
Flexbox Generator
CSS flexbox visualizer and generator. Interactive playground for flex direction, alignment, wrapping, and gap. Generate flex layout code instantly.
Grid Builder
CSS grid generator online. Drag-and-drop grid builder with named areas and auto-placement. Create complex grid layouts visually.
Masonry Layout
CSS masonry layout generator. Create Pinterest-style layouts using pure CSS columns or flexbox fallback. Responsive masonry grid builder.
Responsive Helper
CSS responsive design helper. Generate media queries and common breakpoints for mobile, tablet, and desktop. Responsive layout tool.
Position & Z-Index
CSS positioning playground. Visualize absolute, relative, fixed, sticky positioning and z-index stacking contexts. Layout positioning tool.
Spacing & Gap
CSS spacing generator. Visual margin and padding builder with preview. Generate consistent spacing utilities and layouts.
Aspect Ratio
CSS aspect ratio calculator. Generate aspect-ratio property and padding-hack fallbacks. Visual aspect ratio preview tool.
How these tools run in your browser
Each playground binds CSS properties to controls and shows the result on sample items. Masonry here is CSS columns or a flex approximation, not the newer native masonry spec which is still uneven across browsers. Copy buttons emit the current rule set.
Common Use Cases
- Remember the difference between justify-content and align-items
- Sketch a named grid template before you write production CSS
- Generate a media query for a common breakpoint
- Explain stacking contexts to a teammate with z-index
- Get padding-hack fallbacks for aspect-ratio in older browsers
Common Mistakes
Frequently Asked Questions
For wrapping text around images, maybe. For page layout, flex and grid replaced floats years ago.
Column-based masonry is widely used. Native CSS masonry is still catching up. Check your target browsers.
These generators emit CSS properties. Map them to Tailwind utilities in your own codebase if you use that stack.