oracle/graaljs

GraalJS – A high-performance, ECMAScript compliant, and embeddable JavaScript runtime for Java observed · 2026-08-28

github.com/oracle/graaljs · homepage · C++ · UPL-1.0 (other) observed · 2026-08-28

Health v2 · maintenance only

95/100

Activity 99
Release rhythm 87
Longevity 100

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.

gap_med: 47.0
age_days: 3060
days_rel: 8
days_push: 7
n_releases_24m: 13

Full methodology

Adoption not part of the score

2022 stars · 212 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

GraalJS is a high-performance, ECMAScript-compliant JavaScript engine implemented in Java on top of GraalVM. It can execute JavaScript and Node.js applications and be embedded in Java applications via Maven artifacts, offering Java interoperability and WebAssembly support.

Use cases

embed a javascript engine in a java application
run node.js apps on the jvm
migrate from nashorn or rhino to a modern ecmascript engine
server-side rendering of react on the jvm
script java applications with javascript
run webassembly modules from javascript
evaluate javascript in tools like intellij http client

When to choose

you need a fast, spec-compliant javascript runtime on the JVM
you want to embed JavaScript scripting in a Java host application
you are migrating legacy Nashorn or Rhino code to modern ECMAScript
you need Java/JavaScript interoperability via GraalVM polyglot APIs

When to avoid

you need a standalone JavaScript runtime outside the JVM ecosystem
you require all GraalVM optimizations while running on a stock OpenJDK
your project depends on Nashorn/Rhino-specific non-standard behaviors

Facets

library · maturity active

interpreter programming-language sdk developer-tools programming-languages developer-tools web-development cross-platform jvm cross-platform javascript-engine graalvm ecmascript polyglot nashorn-migration rhino-migration embeddable nodejs

3 sources

readme: https://github.com/oracle/graaljs · fetched 2026-08-28 · dd61f4832d84
homepage: https://www.graalvm.org/javascript/ · fetched 2026-08-29 · bcb672b31c26
site_page: https://www.graalvm.org/javascript/docs · fetched 2026-08-29 · 11d023998689

Member repositories

Repository	Role	Health v2
oracle/graaljs	main	95

For agents

markdown · JSON · MCP: product_card(name="oracle/graaljs")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem