# lmammino/jwt-cracker

Simple HS256, HS384 & HS512 JWT token brute force cracker.

Repository: https://github.com/lmammino/jwt-cracker
Canonical: https://ross.abutalabs.com/products/jwt-cracker
Homepage: https://lmammino.github.io/jwt-cracker/
Language: JavaScript
License: MIT
License Family: permissive
Topics: jwt, jwt-cracker, secrets, alphabet, cracker, brute-force, bruteforce, brute-force-attacks, javascript, nodejs, command-line, command, security
Last push: 2024-07-13T23:31:35+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": 3657, "days_push": 781, "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 1179, forks 167 (observed 2026-08-28T04:03:53.266734+00:00)

## What it is
jwt-cracker is a Node.js command-line tool that brute-forces the signing secrets of HS256, HS384, and HS512 JWT tokens. It supports custom alphabets, maximum length limits, and dictionary files, and only works against weak secrets.

## Use cases
- crack a jwt token with a weak hs256 secret
- audit jwt signing secrets for brute-force resistance
- test jwt tokens against a password dictionary
- recover a lost jwt secret from a token
- pentest tool for jwt token security assessment

## When to choose
- you need a quick, simple CLI to test HS256/384/512 JWT secrets
- you want dictionary-based or alphabet-based brute forcing of JWT tokens
- you are doing a security audit of weak JWT signing keys

## When to avoid
- tokens use RS256 or other asymmetric algorithms
- secrets are long and strong, making brute force infeasible
- you need GPU-accelerated or distributed cracking at scale

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, cryptography, cli, penetration-testing
- domain: security, penetration-testing, developer-tools
- platform: cli, cross-platform
- tags: jwt, brute-force, hs256, token-cracking, password-audit, javascript, command-line, nodejs

## Member repositories
- lmammino/jwt-cracker (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:53.266734+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 2026-08-30T06:26:03.142544+00:00, confidence not recorded.
  - readme: https://github.com/lmammino/jwt-cracker (fetched 2026-08-28T04:03:53.266734+00:00, sha 5a00d5b8d149)
  - homepage: https://lmammino.github.io/jwt-cracker/ (fetched 2026-08-29T12:32:28.957898+00:00, sha 7e9c5d053fc9)
  - registry_npm: https://registry.npmjs.org/jwt-cracker (fetched 2026-08-29T12:32:28.966819+00:00, sha 37132cb2902a)
- Data as of 2026-08-30T08:39:29.467469+00:00.