BIP39 Mnemonic Generator
Generate and validate BIP39 mnemonic phrases for cryptocurrency wallets
All operations happen in your browser. Your data never leaves your device and is not sent to any server.
Generate / Input Mnemonic
Also known as the "25th word" - adds an extra layer of security
Results
Generate or enter a mnemonic phrase to see results
Example Mnemonic Phrases
12 words (128 bits):
abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about
24 words (256 bits):
abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art
About BIP39
BIP39 (Bitcoin Improvement Proposal 39) defines a standard for generating deterministic keys from a mnemonic phrase. It converts random entropy into a human-readable sequence of words that can be used to recover a cryptocurrency wallet.
Key features:
- Word count: 12, 15, 18, 21, or 24 words (corresponding to 128-256 bits of entropy)
- Checksum: Built-in checksum for validation
- Passphrase: Optional 25th word for extra security
- Language support: Multiple language wordlists available
- Deterministic: Same mnemonic always generates the same seed
Use cases: Cryptocurrency wallet recovery, generating deterministic keys, backing up wallet seeds, creating hierarchical deterministic wallets