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Wallet recovery

Mnemonic Converter

Generate and convert BIP39 mnemonics to seeds and addresses. Verify recovery phrases offline.

Security notice
This tool runs in the browser and is intended for education, local recovery drills, and test wallets. Do not paste production seed phrases or private keys into any website unless you have independently verified the execution environment.

Conversion Result

Enter a mnemonic to see results.

About Mnemonic Phrases (BIP39)

What is a Mnemonic Phrase?
A mnemonic phrase (or seed phrase) is a group of easy-to-remember words that store all the information needed to recover a wallet. It is generated according to the BIP39 standard. The words are not random; they are drawn from a specific list of 2048 words.
Read BIP39 Spec →

How does it work?
1. Entropy: Randomness is generated (128-256 bits).
2. Checksum: A part of the SHA256 hash of the entropy is appended to ensure integrity.
3. Mapping: The result is split into 11-bit chunks, each mapping to a word in the wordlist.

Derivation Paths Explained

A single mnemonic can generate infinite accounts for infinite blockchains. This is managed via Derivation Paths (BIP32/BIP44/BIP84), which look like a file system path:
Read BIP44 Spec →
Read BIP84 Spec →

m / purpose' / coin_type' / account' / change / address_index
  • Purpose: The standard used (e.g., 44' for BIP44, 84' for Native SegWit).
  • Coin Type: Unique ID for each crypto (e.g., 0' for Bitcoin, 60' for Ethereum).
  • Account: Allows multiple user identities in one wallet (starts at 0').

About SLIP-39 (Shamir Backup)

What is SLIP-39?
SLIP-39 describes a method for splitting a master secret into multiple mnemonic shares using Shamir's Secret Sharing. You can configure a threshold (e.g., 2-of-3), meaning you need any 2 shares out of the 3 to recover your wallet.
Read SLIP-39 Spec →

Security Best Practices

Never Do This

  • Never take a screenshot of your seed phrase.
  • Never save it in cloud storage (iCloud, Drive, Evernote).
  • Never type it into a website unless recovering funds.

Always Do This

  • Write it down on paper (or punch into metal).
  • Store multiple copies in different secure locations.
  • Use a hardware wallet for significant amounts.