Download as Photo Collage

I kept wanting to save a set of images from a page as one shareable picture instead of twenty separate files you have to zip or scroll through. So: select images on any website, download a collage.

The first decision was userscript over browser extension. A userscript is one paste into Tampermonkey or one click on Greasy Fork. No store review, no packaging, works in any browser with a userscript manager. The tradeoff is no extension APIs and no popup UI, so the interface is a floating window injected into the page itself: it shows a count of captured images as you browse, you click it to review them, select the ones you want, and it renders the collage for download.

Making one UI survive injection into arbitrary pages, each with its own styles and layouts, was most of the work. The site doesn't know the script exists, so everything has to be self-contained.

It's published on Greasy Fork as Photo Grid Generator, where strangers use it, which was the most satisfying part of a small tool like this.