# davidbonnet/astring

🌳 Tiny and fast JavaScript code generator from an ESTree-compliant AST.

Repository: https://github.com/davidbonnet/astring
Canonical: https://ross.abutalabs.com/products/astring
Language: JavaScript
License: MIT
License Family: permissive
Topics: code-generator, javascript, ast, estree, codegen
Last push: 2024-12-01T12:16:56+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4048, "days_push": 640, "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 1246, forks 62 (observed 2026-08-28T04:04:07.142601+00:00)

## What it is
Astring is a tiny, fast, dependency-free JavaScript code generator that produces JavaScript source code from ESTree-compliant ASTs. It supports modern ECMAScript up to ES2024 and stage 3 proposals, with optional source map and comment generation.

## Use cases
- generate JavaScript code from an AST
- print an ESTree AST back to source code
- build a custom JavaScript transpiler or codemod
- regenerate code after AST transformations
- fast codegen alternative to Babel or Escodegen
- generate source maps for generated JavaScript

## When to choose
- you need a small, fast, dependency-free code generator for ESTree ASTs
- you are building a transpiler, minifier, or codemod tool on top of Acorn or Meriyah
- performance matters more than pretty-printed formatting

## When to avoid
- you need formatted or style-preserving output like Prettier
- you need to parse JavaScript rather than generate it
- you need to generate code for other languages

## Facets
- artifact type: library
- maturity: stable
- function: parser, compiler, developer-tools
- domain: parsers, programming-languages, developer-tools
- platform: browser, cross-platform
- tags: estree, ast, codegen, javascript, source-maps, zero-dependency, nodejs, deno

## Member repositories
- davidbonnet/astring (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:07.142601+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 2026-08-30T05:08:02.759277+00:00, confidence not recorded.
  - readme: https://github.com/davidbonnet/astring (fetched 2026-08-28T04:04:07.142601+00:00, sha 97fa3fc39f59)
  - registry_npm: https://registry.npmjs.org/astring (fetched 2026-08-29T12:19:28.498703+00:00, sha 2d59de3328ee)
- Data as of 2026-08-30T08:39:29.467469+00:00.