BIP39 Generator
Generate standard BIP39 mnemonic backup phrases (12, 15, 18, 21, or 24 words) securely in your browser to back up your wallets.
Frequently Asked Questions
What is BIP39?
BIP39 (Bitcoin Improvement Proposal 39) describes the implementation of a mnemonic sentence—a group of easy-to-remember words—for generating deterministic cryptographic keys. It is widely used in cryptocurrency wallets as a seed recovery phrase.
Are my generated mnemonics secure?
Yes. Mnemonics are generated 100% client-side in your browser using standard cryptographically secure random values (via `window.crypto.getRandomValues`) mapped to the official English BIP39 wordlist. No seed data ever leaves your device.
What is the difference between a 12-word and 24-word recovery phrase?
A 12-word phrase provides 128 bits of entropy, while a 24-word phrase provides 256 bits. Both are exceptionally secure, but 24-word seeds offer higher cryptographic resistance against potential future brute-force capabilities.
Can I import the generated seed phrase into hardware wallets?
Yes. Since this generator follows the standard BIP39 protocol, the seed phrases generated here are fully compatible with Ledger, Trezor, MetaMask, Trust Wallet, and any other wallet supporting BIP39 standards.