Always encrypt your Bitcoin Core wallet ( Settings -> Encrypt Wallet ) with a strong, long passphrase.

Keep a copy of your backup in a different physical location (e.g., a safety deposit box). Recovering a Lost or Corrupted wallet.dat

If you find an old wallet.dat file, you typically need to use the official Bitcoin Core software .

The value stored in wallet.dat files has made them a primary target for scammers.

While recovering the password is hard, it is not impossible. People have successfully recovered large amounts of Bitcoin by using AI tools like Claude to analyze old computer files, as demonstrated in a May 2026 recovery case where a forgotten password from 2015 was cracked [5.1].

In the context of the original Bitcoin Core client (and many derivative coins), wallet.dat is the default filename for the wallet database file. It is a Berkeley DB file that stores critical information, including:

Extracting your private keys loads them into your computer's memory in plain text. If your computer is infected with malware at that moment, your funds will be stolen. This procedure should only be performed on an air-gapped (offline), trusted, and clean computer.

: Print the keys using a non-wireless, offline printer to prevent intercepted data.