![](https://slrpnk.net/pictrs/image/8209ed46-426a-40b5-875a-f8706a80be65.webp)
The code is completely written in JavaScript, so all the code is readable if you look at the source, which is also available on the GitHub page. https://stablenarwhal.github.io/LemmyInstanceMover/js/script.js
It looks like it uses a Lemmy API endpoint to transfer account settings.
Gravity Is A Social Construct, And That’s Ok YT
Edit: I see you’ve already linked the video downthread.