Interactive Before & After Image Slider
The problem: Demonstrating image retouching or UI redesigns requires heavy JavaScript plugins that slow down websites.
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Interactive Before & After Image Slider: the complete guide
The Interactive Before & After Image Comparison Slider compares two visual states with a smooth, draggable split divider. Generate production-ready CSS `clip-path` rules and self-contained HTML/CSS embed code for showcasing photo retouching, UI redesigns, website rebrands, and architectural renovations.
CSS clip-path Polygons vs. Dual Canvas Rendering
Traditional before/after widgets rely on heavy JavaScript libraries and multiple canvas elements. By utilizing modern CSS `clip-path: polygon()`, our implementation renders the split comparison natively through the GPU. This eliminates layout shifts (CLS), maintains 60fps performance on mobile devices, and requires zero external runtime scripts.
Horizontal vs. Vertical Comparison Geometry
Horizontal splits (left-to-right) are standard for landscape photography and desktop software redesigns. Vertical splits (top-to-bottom) provide superior visual balance for portrait fashion photography, mobile app screens, and architecture elevations.
Step by step: how to use Before/After Slider
- 1
Drag the interactive split handle to test the comparison divider in real time.
- 2
Toggle between Horizontal (left/right) and Vertical (top/bottom) split orientations.
- 3
Customize the Before and After layer text labels.
- 4
Click 'Copy clip-path CSS' to grab the CSS polygon formula for your custom styles.
- 5
Or click 'Copy Full Embed Code' to paste the complete responsive component into your website.
Security & privacy
All calculations and CSS code generation execute client-side with zero data tracking.