MyEtherWallet recovery depends on the material originally used: an encrypted keystore, a private key, a mnemonic phrase or a connected hardware wallet. A public address identifies an account but cannot reconstruct its private key.
Identify the recovery material
- An encrypted JSON keystore normally requires its password and a compatible decryptor.
- A private key provides access to its corresponding account; handle it as a secret.
- A mnemonic requires the correct backup standard, account path and any optional passphrase.
- A hardware-wallet account relies on that device or its supported recovery backup.
Read the keystore parameters
Do not assume every Ethereum JSON file uses the same encryption. Ethereum V3 keystores describe the cipher, initialization vector, KDF and KDF parameters in the file; common V3 files use AES-128-CTR with scrypt or PBKDF2. A blanket AES-CBC recipe is incorrect. A presale encseed wallet is a separate historical format and needs its own handler.
Work on an unchanged copy. A compatible tool must derive the key from the file’s parameters and validate the keystore MAC before trusting recovered data. Changing the password field or editing ciphertext does not remove encryption.
Mnemonic words and optional passphrases
A BIP39 passphrase is a separate string, not necessarily one extra word. Different passphrases produce different wallets. Use the original backup standard and verify a known receiving address; a tool accepting the words does not establish that the restored account is the intended one. Check derivation paths and accounts before concluding that an empty balance means recovery failed.
Forgotten password
An intact keystore with useful password context can support a targeted offline search. The realistic search space matters: a strong random password without clues may be infeasible. Preserve all old copies and do not submit wallet files, private keys or words to an unknown website.
Verify before migration
Compare the recovered address with a historical address and inspect its transaction history. Tokens and different networks may need to be selected separately in a current wallet interface. Moving assets is a separate step after the recovery is verified.
References
Need help with recovery?
Email mail@keychainx.io with the wallet type, approximate date, backup extensions and error message. Describe the problem first; do not send passwords, wallet words, private keys or wallet files in an initial message. KeychainX can assess a wallet you own or are legally authorized to recover. Recovery is not guaranteed.
Technical review: 7 October 2026. Recovery depends on the surviving material and the original wallet version.