# bellard/quickjs

Public repository of the QuickJS Javascript Engine.

Repository: https://github.com/bellard/quickjs
Canonical: https://ross.abutalabs.com/products/quickjs
Homepage: https://bellard.org/quickjs
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-06-16T11:35:08+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 87, release rhythm 35, longevity 100
- inputs: {"age_days": 2187, "days_push": 78, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license, no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 10947, forks 1146 (observed 2026-08-28T04:10:44.810065+00:00)

## What it is
QuickJS is a small, embeddable JavaScript engine written in C that supports the ES2025 specification with near-complete test262 conformance. It includes a fast interpreter with very low startup time, a command-line REPL, and tools to compile JavaScript sources into standalone executables.

## Use cases
- embed a JavaScript scripting engine in a C application
- run JavaScript with minimal memory and startup overhead
- compile JavaScript to a standalone executable
- evaluate ES2025 features in a lightweight engine
- add scripting/plugin support to embedded or IoT devices
- run JS on multiple platforms from a single binary

## When to choose
- you need a tiny, dependency-free JS engine with a few C files
- low startup time and deterministic memory usage matter
- you target embedded, IoT, or resource-constrained environments
- you want near-complete ES2025 conformance in a small footprint

## When to avoid
- you need a JIT-compiled engine for maximum throughput (use V8 or SpiderMonkey)
- you need browser APIs like DOM or WebAssembly runtime out of the box
- you need a large ecosystem of npm tooling and debugging integrations
- you require long-term LTS support from a vendor

## Facets
- artifact type: library
- maturity: active
- function: interpreter, compiler, cli, embedded
- domain: programming-languages, developer-tools, embedded-systems, cross-platform
- platform: windows, bsd, cross-platform, cli, c, embedded, wasm
- tags: javascript-engine, es2025, embeddable, small-footprint, interpreter, scripting, linux, macos

## Member repositories
- bellard/quickjs (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:44.810065+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 2026-08-29T17:17:18.567557+00:00, confidence not recorded.
  - homepage: https://bellard.org/quickjs (fetched 2026-08-29T08:16:03.715673+00:00, sha d1c978ccb3dd)
  - site_page: https://bellard.org/quickjs/Changelog (fetched 2026-08-29T08:16:03.718995+00:00, sha c7bbedc02e43)
  - site_page: https://bellard.org/quickjs/binary_releases (fetched 2026-08-29T08:16:03.721003+00:00, sha a75574de4933)
- Data as of 2026-08-30T08:39:29.467469+00:00.