is a Python script (part of the John the Ripper suite of tools) designed to extract hash values from Bitcoin wallet files. These extracted hashes can then be fed into John the Ripper (or Hashcat) for offline password cracking attempts.
The output is a string formatted for John the Ripper. It looks something like this: Bitcoin2john
In 2022, a Reddit user from r/Bitcoin described recovering 14.3 BTC (worth over $300,000 at the time) using exactly this method. He had encrypted his wallet in 2013 with a passphrase he vaguely remembered: MySumm3rV@cati0n! . After extracting the hash with Bitcoin2john, he used Hashcat with a custom rule set appending ! to dictionary words from his old emails. The password cracked in 4 hours. Without Bitcoin2john, those coins would have been permanently lost. is a Python script (part of the John
Modern BIP39 seed phrase wallets (most 12/24-word wallets) are not directly crackable via Bitcoin2john unless they also have an encrypted wallet file. For BIP39, you need tools like btcrecover or findmycoins . It looks something like this: In 2022, a