https://desktopsetup.github.io/XD2Joy-Webtool/
Release notes on the Web-Tool are made in firmware's releases smaller changes might not be added but you can always see the changes in this repo
Main icon buttons are from Switch 2 Button Icons and Controls by Zacksly, used under CC BY 3.0, and are not made by me.
The font is Noto Sans by The Noto Project Authors, under the SIL Open Font License 1.1, the license is in fonts/OFL.txt.
For issues or remapping the source code is here, use a web browser with com port support.