This tool allows you to decode VINs specifically for Rivian vehicles.
Currently it supports R1T, R1S, RCV and the EDV. There's still some shenanigans I have to deal with regarding the trim levels post peregrine refresh.
The usage is obvious. https://firworksyt.github.io/RivianVINWrangler/
This project is licensed under the WTFPL - see the LICENSE file for details.