CSS Columns masonry (also called waterfall layout) uses the column-count and column-gap properties to arrange content into multiple columns, flowing vertically. Unlike JavaScript-based masonry like Masonry.js or Isotope, CSS Columns is pure CSS with zero dependencies. Items flow top-to-bottom within each column, making it ideal for text-heavy content, image galleries, and card-based layouts where strict horizontal ordering isn't critical.

The key difference is the flow direction. CSS Columns arranges items vertically (top-to-bottom per column, then left-to-right across columns), while JS masonry libraries like Masonry.js arrange items horizontally (left-to-right, placing each item in the shortest column). This means CSS Columns is better for content where vertical reading order is natural. It also requires no JavaScript, resulting in better performance and simpler implementation.

Yes! CSS column-count has excellent browser support, covering 98%+ of global users. It works in Chrome, Firefox, Safari, Edge, and even Internet Explorer 10+. The critical break-inside: avoid property (which prevents items from splitting across columns) is supported in all modern browsers. For IE10-11, you may need the legacy page-break-inside: avoid fallback.

Use media queries to adjust column-count at different breakpoints. For example: 4 columns on desktop (>992px), 3 columns on tablet (768-992px), 2 columns on mobile (<768px). You can also adjust column-gap for tighter spacing on smaller screens. Enable the "Responsive" toggle in this generator to automatically include media queries in the output CSS.

break-inside: avoid prevents a card or content block from being split across two columns. Without it, a card that starts near the bottom of one column might have its top half in that column and the bottom half at the top of the next column — which looks terrible. This property ensures each card stays intact as a single unit, preserving the masonry aesthetic.

CSS Grid alone cannot create a true masonry layout because Grid requires defined rows. However, the upcoming grid-template-rows: masonry specification (part of CSS Grid Level 3) will enable native masonry in Grid. As of now, this feature is only available in Firefox behind a flag. Until it lands in all browsers, CSS Columns remains the best pure-CSS approach for masonry layouts.

Add transition properties to your masonry items. Common effects include: slight upward lift (transform: translateY(-3px)), enhanced shadow, or scale changes. Always use will-change: transform sparingly for performance. The generator above includes a subtle hover lift effect on cards — adjust the values to match your design system.