A scroll-driven photo gallery uses CSS scroll-snap to create a horizontally scrollable image carousel that automatically aligns (snaps) to each image as the user scrolls. Unlike traditional JavaScript carousels, this approach relies entirely on native browser scrolling behavior, making it faster, lighter, and more accessible. Modern CSS scroll-driven animations (available in Chrome 115+) can further enhance the experience with view-timeline animations — all without a single line of JavaScript.

CSS scroll-snap uses two key properties: scroll-snap-type on the container (e.g., x mandatory for horizontal snapping) and scroll-snap-align on each child item (e.g., center to snap items to the center of the viewport). When a user scrolls, the browser's scroll engine automatically decelerates and aligns the nearest snap point. Combine with scroll-behavior: smooth for buttery-smooth transitions. This is supported in all modern browsers (Chrome, Firefox, Safari, Edge) since 2018-2019.

Scroll-snap has excellent support: Chrome 69+, Firefox 68+, Safari 11+, Edge 79+ (effectively all browsers from 2018+). The scroll-driven animations (animation-timeline) feature is newer, supported in Chrome 115+ and Edge 115+ (2023+), with Firefox and Safari support in development. Our generated code uses scroll-snap as the core mechanism (universal support) and includes optional scroll-driven animation enhancements as progressive enhancement — they simply won't activate in unsupported browsers, gracefully degrading to the base experience.

• Performance: No JavaScript parsing, no event listeners, no requestAnimationFrame loops. The browser's native scroll engine is highly optimized.
• Bundle Size: Zero kilobytes of JavaScript. Compare to popular carousel libraries that can be 10-50KB+ gzipped.
• Accessibility: Native scroll behavior respects user preferences (reduced motion, scroll speed, etc.) automatically.
• Reliability: No JavaScript bugs, no framework conflicts, no initialization timing issues.
• SEO Friendly: All images are in the DOM from the start, fully indexable by search engines.
• Mobile First: Touch scrolling feels completely natural on mobile devices.

The generated CSS is clean and well-commented, making customization straightforward. You can adjust: gallery height (via the height property on images), image width (via flex-basis or width on items), spacing (via gap on the flex container), border radius for rounded corners, shadow intensity for depth, scrollbar visibility, and snap alignment (start/center/end). All these settings are adjustable in our tool above, and the code updates in real-time.

Absolutely! The scroll-snap gallery is inherently responsive. On mobile devices, users can naturally swipe through images with touch gestures. The flex-based layout adapts to any screen width. You can use percentage-based widths, viewport units (vw), or CSS clamp() for fine-tuned responsive control. The gallery works beautifully on screens from 320px smartphones to ultra-wide monitors. For advanced responsiveness, consider using media queries to adjust image heights and widths at different breakpoints.

While the core gallery is pure CSS, navigation controls (arrows, dots) typically require minimal JavaScript to scroll the container programmatically. However, there are creative CSS-only approaches: using <a> anchor links with scroll-behavior: smooth to jump to specific images, or using the :has() selector with radio buttons for dot indicators (limited browser support). For most practical use cases, we recommend adding ~10 lines of JavaScript for arrow buttons, which we've demonstrated in the preview above. The generated code includes these optional JS enhancements as comments.