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Small, single-purpose tools for your daily development workflow. Runs in the browser, no data is sent to any server.
🔧 BIP39 passphrase generator
Generate a BIP39 mnemonic (recovery phrase): 12/15/18/21/24 words. Entropy from crypto.getRandomValues, checksum via SHA-256 (crypto.subtle); words are drawn from the embedded official 2048-word BIP39 English list. Fully client-side; the phrase is never sent anywhere.