I make graphics mods for Oblivion Remastered. My most-downloaded one, Lumiere, adds hundreds of lights across the world at night, and the only honest way to show what a lighting mod actually does is a before/after slider people can drag. The tool everyone used for that, imgsli, went offline a while back, so I built my own: imgi.co. It turned out useful well beyond my mod pages, so here is what it does and how it is built.

What it does

Drag a slider to compare two images, horizontal or vertical, with mouse, touch, or keyboard.

Every comparison is a permanent shareable link, plus an iframe embed for your own site or a mod page.

Export a comparison as a GIF, MP4, or WebP for places a slider cannot embed.