# estools/escodegen

ECMAScript code generator

Repository: https://github.com/estools/escodegen
Canonical: https://ross.abutalabs.com/products/escodegen
Language: JavaScript
License: BSD-2-Clause
License Family: permissive
Topics: estree, ast, javascript, ecmascript
Last push: 2024-07-17T02:01:51+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5296, "days_push": 778, "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 2691, forks 338 (observed 2026-08-28T04:07:11.016217+00:00)

## What it is
Escodegen is an ECMAScript (JavaScript) code generator that produces JavaScript source code from ESTree/Mozilla Parser API abstract syntax trees. It runs in Node.js and browsers and is part of the estools tooling ecosystem.

## Use cases
- generate JavaScript source code from an AST
- implement a transpiler or code transformer
- pretty-print ESTree ASTs back into JS
- build code generation tools for linters or codemods
- emit JS code programmatically in a browser

## When to choose
- you have an ESTree AST and need to emit JavaScript source
- you are building transpilers, codemods, or AST-based code tools
- you need a mature, widely used JS code generator with browser support

## When to avoid
- you need to parse JavaScript rather than generate it
- you need generation for non-JavaScript languages
- you need actively developed support for the newest ECMAScript syntax

## Facets
- artifact type: library
- maturity: maintenance
- function: compiler, parser, developer-tools
- domain: developer-tools, programming-languages, parsers
- platform: browser
- tags: estree, ast, code-generation, ecmascript, javascript, nodejs

## Member repositories
- estools/escodegen (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:11.016217+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 2026-08-30T02:16:33.500537+00:00, confidence not recorded.
  - readme: https://github.com/estools/escodegen (fetched 2026-08-28T04:07:11.016217+00:00, sha 6668726c9435)
  - registry_npm: https://registry.npmjs.org/escodegen (fetched 2026-08-29T09:59:49.398609+00:00, sha c3a88ac00a9e)
- Data as of 2026-08-30T08:39:29.467469+00:00.