BIP39 Mnemonic Generator

Generates and validates BIP39 mnemonic seed phrases using 9 official wordlists (English, Japanese, Korean, Spanish, Simplified/Traditional Chinese, French, Italian, Portuguese) with selectable word counts of 12, 15, 18, 21, or 24. It derives the full HD wallet chain: entropy hex, seed hex, BIP32 root xprv/xpub, account-level extended keys, and batches of derived addresses with their paths, public keys, and private keys.

1. Choose Word Count (12-24) and Language, then click Generate to create a new mnemonic, or paste your own to validate it (the border turns green/red after a 300ms check). 2. Optionally enter a passphrase (BIP39 password) to derive the seed with extra entropy. 3. Switch between BIP84 (bech32 Native SegWit), BIP49 (P2SH-P2WPKH), or BIP44 (Legacy P2PKH) derivation tabs and pick how many addresses (5/10/15/20) to derive. 4. Use the show/hide toggle to reveal sensitive values (seed, xprv, private keys); each field has its own copy button.

Each tab uses a specific purpose and address format: BIP84 follows m/84'/0'/0'/0/i producing bc1... bech32 addresses; BIP49 follows m/49'/0'/0'/0/i producing 3... P2SH-wrapped SegWit addresses; BIP44 follows m/44'/0'/0'/0/i producing 1... legacy addresses. The root key (path m) and account-level extended keys (path m/purpose'/0'/0') are shown as Base58Check-encoded xprv/xpub pairs. Entropy is displayed as hex derived from the mnemonic using the wordlist.