# decaffeinate/decaffeinate

Goodbye CoffeeScript, hello JavaScript!

Repository: https://github.com/decaffeinate/decaffeinate
Canonical: https://ross.abutalabs.com/products/decaffeinate
Homepage: https://decaffeinate-project.org/
Language: TypeScript
License: MIT
License Family: permissive
Topics: coffeescript, conversion, decaffeinate
Last push: 2024-06-21T04:38:32+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": 4247, "days_push": 803, "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 2708, forks 120 (observed 2026-08-28T04:07:11.687526+00:00)

## What it is
decaffeinate is a CLI tool that converts CoffeeScript source code into modern JavaScript. It is a mature, production-tested converter used to migrate large codebases away from CoffeeScript.

## Use cases
- convert coffeescript to javascript
- migrate codebase off coffeescript
- rewrite .coffee files as modern js
- bulk convert a project from coffeescript
- modernize legacy coffeescript code

## When to choose
- you need to migrate CoffeeScript projects to JavaScript
- you want a battle-tested converter used on millions of lines of production code
- you want a CLI plus an online repl for quick conversions

## When to avoid
- you need live transpilation of CoffeeScript at runtime rather than one-time conversion
- your project is not CoffeeScript
- you expect active feature development - the project is complete and in maintenance

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: parser, developer-tools, cli
- domain: developer-tools, programming-languages, parsers
- platform: cli, cross-platform
- tags: coffeescript, code-conversion, code-migration, transpiler, javascript, automation, nodejs

## Member repositories
- decaffeinate/decaffeinate (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:11.687526+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 2026-08-30T02:15:41.256497+00:00, confidence not recorded.
  - readme: https://github.com/decaffeinate/decaffeinate (fetched 2026-08-28T04:07:11.687526+00:00, sha 1c31367bc8ac)
  - homepage: https://decaffeinate-project.org/ (fetched 2026-08-29T09:59:08.459286+00:00, sha 7962dbf2d58e)
- Data as of 2026-08-30T08:39:29.467469+00:00.