This project permits to calculate the XOR of 2 or more bip39 mnemonic seed phrase. This has a nice interactive interface and can calculate the xor seed of 12 or 24 words seeds. Seed XOR is a nice way to keep your bitcoin backup safe.
Just download the project, open a terminal and type:
python3 main.py
The code is very minimal and simple so that can be reviewed. In order to avoid that you have to review the bip39 words list, it is in a separate file and you can just delete that one and download it again from https://raw.githubusercontent.com/bitcoin/bips/master/bip-0039/english.txt and save it as english.txt
Use this project at your own risk.
I DON'T have any responsability of how you will use it and eventual money loss.
Don't use this project for your actual wallet if you don't know what you are doing!!
Use it on a safe environment offline like tails OS OFFLINE