# iancoleman/bip39

A web tool for converting BIP39 mnemonic codes

Repository: https://github.com/iancoleman/bip39
Canonical: https://ross.abutalabs.com/products/bip39
Homepage: https://iancoleman.io/bip39/
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2024-04-28T01:42:14+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4367, "days_push": 858, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4300, forks 1624 (observed 2026-08-28T04:08:41.597611+00:00)

## What it is
A web-based tool for converting BIP39 mnemonic seed phrases into addresses and private keys across many cryptocurrencies. It can be used online or as a standalone offline HTML file for air-gapped security.

## Use cases
- convert a BIP39 mnemonic phrase to addresses and private keys
- generate a random 12-24 word seed phrase offline
- derive wallet addresses from a recovery phrase with custom derivation paths
- export private keys from a mnemonic to import into a wallet
- recover wallet addresses from a seed phrase with a passphrase

## When to choose
- you need to inspect or derive keys from a BIP39 seed phrase
- you want an offline, air-gapped tool for wallet recovery
- you need multi-coin address derivation from one mnemonic

## When to avoid
- you need a programmatic library to embed in your own code rather than a UI tool
- you need a full wallet application for transacting
- handling high-value keys where even offline browser tools carry unacceptable risk

## Facets
- artifact type: application
- maturity: stable
- function: cryptography, developer-tools, cli
- domain: security, developer-tools
- platform: browser, cross-platform
- tags: bip39, mnemonic, wallet, bitcoin, offline-tool, seed-phrase, cryptocurrency, web-server

## Member repositories
- iancoleman/bip39 (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:41.597611+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 2026-08-29T18:21:50.717075+00:00, confidence not recorded.
  - readme: https://github.com/iancoleman/bip39 (fetched 2026-08-28T04:08:41.597611+00:00, sha e58271086abb)
  - homepage: https://iancoleman.io/bip39/ (fetched 2026-08-29T09:11:18.398702+00:00, sha 72a16973fed4)
- Data as of 2026-08-30T08:39:29.467469+00:00.