jsBIP39

Ported from the reference implementation at https://github.com/trezor/python-mnemonic

Mnemonic code for generating deterministic keys

BIP39 Specification at https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

Usage

var m = new Mnemonic("english")

// Generate new mnemonics
var words = m.generate();
"canyon subway other flower grocery diagram cigar such custom rude couch horror"

// Check mnemonics are valid
var isValid = m.check(words);
true

// Generate BIP32 seeds from mnemonics
var seed = m.toSeed(words, "mysecretpassword");
"b4f0524dd1fcfc15ac2408fc9228df71c706aab238f8558d3b2bb3f4bce8ea25be9a3a6fc684a16ebfbb1240aee3decb404b856dd57298ce150441965c91c6e9"

// Generate mnemonics of different strengths
var lessWords = m.generate(64)
"safe soon minute hungry toss mobile"

// Test mnemonics are valid
var invalidMnemonic = "safe soon minute hungry toss cigar";
m.check(invalidMnemonic);
false

Supported Languages

var m = new Mnemonic("english")
var m = new Mnemonic("japanese")
var m = new Mnemonic("spanish")
var m = new Mnemonic("chinese_simplified")
var m = new Mnemonic("chinese_traditional")
var m = new Mnemonic("french")
var m = new Mnemonic("italian")
var m = new Mnemonic("korean")

Tests

Tests run in the browser.

$ cd /path/to/repo/
$ python -m http.server

Open http://localhost:8000/test/ in your browser

Node / NPM

If you prefer to use node / npm please have a look at bitcoinjs/bip39.

Thanks

This code uses asmCrypto https://github.com/tresorit/asmcrypto.js

The people who authored and contributed to BIP39 and the reference client