Before/After Slider Generator

Before/after sliders are conversion machines for photographers, remodelers, dentists, detailers and skincare brands — but the usual way to add one is a third-party widget app that charges around $10 a month, loads external scripts on every page view, and stamps its branding on your site until you pay more. A self-hosted slider does the same job with a few kilobytes of code that lives on your own page, loads with it, and answers to nobody.

The snippet this generator produces is deliberately boring in the best way: two stacked images, a draggable handle, and about sixty lines of inline CSS and JavaScript with unique IDs, so you can paste several sliders on one page without conflicts. Because everything is inline, there is no render-blocking third-party request and no tracking pixel phoning home — your visitors' browsers never talk to anyone but your server. The images carry proper alt text and lazy loading, so the slider doesn't hurt your page speed scores or image SEO the way heavy widget embeds do.

For the strongest comparison, use two photos shot from the same angle with the same framing — crop them to identical dimensions before uploading so the slider lines up perfectly. Keep file sizes sensible (under 300 KB each, exported as WebP or compressed JPEG) because the slider loads both images up front; visitors on slow connections will thank you. And place the slider high on the page: a visible, draggable comparison is one of the few interactive elements that consistently lifts time-on-page for visual businesses.