Very cool! I like how you can play around with it. 

Will flipping the dice ever create an invalid checksum? I've tried this in wallet software just to enter random words. The last word is limited to get a valid check sum. I Still haven't really understood how the last word can't just be any from the list.

WeAreAllSatoshi

stax

bitcoin

This started as a fun JS experiment for myself, exploring how seed phrases are built from entropy. After positive feedback from friends, I turned it into a full guide to wallet recovery phrases - covering entropy, checksums, SHA-256, and how it connects to HD wallets (in a hopefully accessible way).

It’s fully interactive - flip bits, see your mnemonic change. I hope it offers an intuitive way to understand what’s going on under the hood.

Feedback and suggestions very welcome.