blockchain
BIP39 Mnemonic Generator
Generate cryptographically secure BIP39 mnemonic phrases (12 or 24 words) and validate existing ones. Runs 100% in your browser — your seed phrase never leaves your device.
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Important security warnings
- Never use a mnemonic generated on ANY website for real funds. This tool is for education and testing only.
- Never share your mnemonic with anyone, ever. It gives complete control of your wallet.
- Never save your mnemonic to localStorage, cloud storage, email, or screenshots.
- Never use this on a compromised or public computer.
- For real wallets, generate offline using hardware wallets (Ledger, Trezor) or trusted offline tools.