Offline edition of the tools on bip39-phrase.com: the seed phrase generator, BIP39 checksum checker, last word calculator and seed phrase to private key converter, built from the same code as the site, with all 10 BIP39 wordlists inside. Open the file in any modern browser: it needs no installation and no internet connection, and its Content-Security-Policy blocks network requests.
To check your copy, compare its SHA-256 with the value published on bip39-phrase.com next to the download link: shasum -a 256 bip39-tools-offline.html on macOS and Linux, certutil -hashfile bip39-tools-offline.html SHA256 on Windows.
© 2026 BIP39 Phrase · Version 1.0.0, built 2026-10-19