mnemonic
Implementation of Bitcoin BIP-0039
Decision gist · record as of 2026-08-14
Yes, if you need mnemonic generation or validation in a Python project. The package is stable, dependency-free, and implements a well-defined standard. However, dormant maintenance (no updates in 952 days) means no active support for bugs or security issues—acceptable for a narrow, mature specification but worth noting if you require ongoing maintenance.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.8.1 or later; support for Python below 3.8 was dropped in version 0.21.
- Low install friction with no runtime dependencies.
- Maintenance is dormant—last release was 952 days ago—so expect no active bug fixes or feature updates, though the package remains stable for its narrow, well-defined purpose.
License · maintenance · safety
MIT (permissive) — MIT license permits free use, modification, and distribution with minimal restrictions, making it suitable for both open-source and commercial projects.
last release 2024-01-05 (952 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 834,827 downloads/mo, #4,936 on PyPI
Alternatives
Verify before relying
pip install mnemonic
from mnemonic import Mnemonic
mnemo = Mnemonic("english")
words = mnemo.generate(strength=256)
seed = mnemo.to_seed(words, passphrase="")- Whether the package is actively maintained or if dormancy signals end-of-life for this implementation
- Security audit status or known limitations in the implementation relative to other libraries
- Whether custom word lists are validated against any standard or left to caller responsibility
What it is and what it does
mnemonic is a reference implementation of the Bitcoin standard for encoding entropy into human-readable word sequences. It generates mnemonic phrases (word lists) from random entropy and converts them into cryptographic seeds suitable for deterministic wallet key generation. The package supports multiple languages including English, Chinese Simplified and Traditional, French, Italian, Japanese, Korean, Spanish, Turkish, Czech, and Portuguese, and allows custom word lists.
The library has no runtime dependencies and is designed as a focused, single-purpose tool: take entropy or a word list, validate it, and produce a seed. It's commonly used in cryptocurrency wallet implementations, hardware wallet firmware, and key management tools. The implementation is stable but dormant, with the last release on 2024-01-05.
Use it for
- Generate a new mnemonic seed phrase for a cryptocurrency wallet during account creation.
- Convert an existing mnemonic word list into a binary seed for wallet key derivation.
- Recover wallet keys from a known mnemonic phrase by regenerating its seed with an optional passphrase.
- Validate a user-provided mnemonic against the word list and recover its original entropy.
- Support multilingual wallet interfaces by generating or validating mnemonics in supported languages.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need mnemonic generation or validation in a Python project.
The package is stable, dependency-free, and implements a well-defined standard. However, dormant maintenance (no updates in 952 days) means no active support for bugs or security issues—acceptable for a narrow, mature specification but worth noting if you require ongoing maintenance.
Install
mnemonic on PyPI
Before you install
Low install friction with no runtime dependencies. Maintenance is dormant—last release was 952 days ago—so expect no active bug fixes or feature updates, though the package remains stable for its narrow, well-defined purpose.
Requires Python 3.8.1 or later; support for Python below 3.8 was dropped in version 0.21.
License in practice
MIT license permits free use, modification, and distribution with minimal restrictions, making it suitable for both open-source and commercial projects.
Quickstart
pip install mnemonic
from mnemonic import Mnemonic
mnemo = Mnemonic("english")
words = mnemo.generate(strength=256)
seed = mnemo.to_seed(words, passphrase="")Verify before relying
- Whether the package is actively maintained or if dormancy signals end-of-life for this implementation
- Security audit status or known limitations in the implementation relative to other libraries
- Whether custom word lists are validated against any standard or left to caller responsibility
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.8.1 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Dormant 952 days since the last release |
| First released | |
| Downloads | 834,827 / month, #4,936 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.9 |
Evidence: mnemonic-0.21-py3-none-any.whl
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See also bip-utils · keysymdef · shamir-mnemonic · hdwallet · py-bip39-bindings · bip32 · xkcdpass · diceware · slip10 · bittensor-wallet