# bitcoinjs/bip39

JavaScript implementation of Bitcoin BIP39: Mnemonic code for generating deterministic keys

Repository: https://github.com/bitcoinjs/bip39
Canonical: https://ross.abutalabs.com/products/bitcoinjs-bip39
Language: JavaScript
License: ISC
License Family: permissive
Topics: bitcoin, mnemonic, bip39, bip, bitcoinjs, javascript
Last push: 2026-01-21T23:08:32+00:00

## Health v2 (maintenance only)
Score: 61/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 63, release rhythm 35, longevity 100
- inputs: {"age_days": 4559, "days_push": 224, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1179, forks 458 (observed 2026-08-28T04:03:53.236474+00:00)

## What it is
A JavaScript library implementing Bitcoin BIP39 mnemonic code for generating deterministic keys from entropy. It supports multiple language wordlists and converts between entropy, mnemonic phrases, and seeds.

## Use cases
- generate a BIP39 mnemonic seed phrase in JavaScript
- convert entropy to a mnemonic phrase
- recover a wallet from a 12 or 24 word recovery phrase
- validate mnemonic checksums in a crypto wallet app
- generate deterministic keys from a seed phrase
- support multilingual BIP39 wordlists in a wallet

## When to choose
- building a Bitcoin or cryptocurrency wallet in JavaScript or TypeScript
- you need standards-compliant BIP39 mnemonic generation and validation
- you want to bundle only specific language wordlists to keep bundles small

## When to avoid
- you need full wallet functionality like key derivation or transaction signing (use a broader wallet library)
- your project is not JavaScript/Node.js based
- you need BIP32/BIP44 hierarchical derivation, which this library does not provide

## Facets
- artifact type: library
- maturity: stable
- function: cryptography, serialization, sdk
- domain: security, developer-tools
- platform: browser
- tags: bip39, bitcoin, mnemonic, seed-phrase, wallet, deterministic-keys, wordlists, cryptocurrency, nodejs, javascript

## Member repositories
- bitcoinjs/bip39 (main) score 61

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:53.236474+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:25:31.439529+00:00, confidence not recorded.
  - readme: https://github.com/bitcoinjs/bip39 (fetched 2026-08-28T04:03:53.236474+00:00, sha f11f762c1e17)
  - registry_npm: https://registry.npmjs.org/bip39 (fetched 2026-08-29T12:32:18.841671+00:00, sha 21b3208337f4)
- Data as of 2026-08-30T08:39:29.467469+00:00.