2 CSS Image Comparison Sliders

css August 20, 2025 by Vladimir 1 min read

Before-and-after comparisons require interaction. Most implementations rely on heavy JavaScript libraries. This collection proves CSS handles the visual layer efficiently, leaving only essential interactivity to JavaScript.

The Pure CSS Image Comparison Sliders showcase demonstrates layout techniques using CSS Grid for two-image positioning, clip-path for dynamic reveal masks, and position: absolute with width transitions for slider handles. Some snippets use pure CSS with :checked pseudo-selectors on hidden inputs; others pair minimal JavaScript for smooth drag interaction. Semantic HTML structure uses <figure> elements and proper image markup with alt attributes.

Responsive layouts adapt through max-width containers and flexible positioning. Cross-browser compatibility spans modern browsers with tested fallbacks. Accessibility includes keyboard navigation (arrow keys), focus indicators, ARIA labels, and screen reader support that describes both images clearly.

Each demo is available on CodePen for testing on multiple devices. Download snippets directly — all code is free and ready for production.

Examples

Comparative Slider

A clean and effective image comparison slider built with pure CSS masks and a single CSS custom property. This technique allows for a responsive and lightweight solution without using complex JavaScript libraries.

See the Pen Comparative Slider.

Image Comparison Slider with CSS Scroll Animation

A cutting-edge image comparison slider powered by CSS scroll-driven animations, using view-timeline to link range input scrolling directly to the image masking logic.