Comparador antes y después

A before and after comparison of two photos: a slider you drag to wipe between them, a side-by-side picture, an animated GIF that wipes back and forth by itself (great for social media), or a web page file with the working slider.

No. The second photo is fitted to the first one's shape, so both line up. For the best result, take both from the same spot, or crop them to match first.

Yes. Download the web page: it's one file with both photos inside it. Open it in a browser, or put it on your site and link to it or show it in an iframe.

No. Everything is made in your browser.