About BIP39 Phrase

Updated

bip39-phrase.com is a reference site for the BIP39 standard — the 2048-word mnemonic wordlist behind the seed phrases used by most cryptocurrency wallets. We publish the complete wordlist in English and 9 other official languages, a page for every individual word, and free tools: a seed phrase generator, a seed-to-key converter, a private key generator, a checksum checker, a last word calculator and a step-by-step BIP39 visualizer. Outside the BIP39 topic, the site also hosts an IPv6 WHOIS lookup.

How the tools work

Every tool on this site runs entirely in your browser. Key generation and derivation use the audited open-source libraries @scure/bip39, @scure/bip32 and @noble/curves. Nothing you type or generate in them is sent to our server — the site is fully static and has no backend at all. You can verify this yourself: load a tool page, disconnect from the internet, and it keeps working.

Where the data comes from

All wordlists are taken verbatim from the official Bitcoin BIPs repository. Derived data on word pages (index numbers, binary encodings, prefixes, cross-language overlaps) is computed directly from those lists at build time.

How we write and check articles

  • Primary sources. Articles cite the BIP and SLIP texts, wallet makers' help centers and release notes, official code repositories, and government or court sites, with links in the text. Third-party blogs are not used as sources for facts.
  • Verified numbers. Addresses, keys, seeds and checksums shown in articles come from public test phrases. They are computed with the same open-source libraries the tools use and compared with the official test vectors where those exist.
  • Current instructions. Step-by-step wallet instructions are checked against the developer's current help pages, release notes or app source code, because menus change between versions.
  • Visible dates. Every article shows when it was published and, after a substantive revision, when it was updated. Typo fixes and new links do not change the date.
  • Safety first. No article asks you to type a real seed phrase or private key into a website, this one included.

Corrections

If you find a mistake, write to us with the page address and what is wrong (see Contact below). We check the claim against the primary source, correct the article and, for a substantive correction, update its date.

Important disclaimer

This site is educational. Nothing here is financial advice, and our tools are not a wallet. Please read the security notes before using any seed phrase or private key tool. What data the site and its analytics receive is described in the privacy policy, and the rules for using the site and its tools in the terms of use.

Contact

Email: info@bip39-phrase.com · Telegram: @BIP39_CHAT · X: @Tundra838554