boa-dev/boa

Health v2 · maintenance only

Adoption not part of the score

7604 stars · 676 forks observed · 2026-10-14

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Boa is an embeddable JavaScript engine (lexer, parser, and interpreter) written in Rust with support for over 90% of the latest ECMAScript specification. It ships as a set of Rust crates including boa_engine, boa_parser, and boa_cli, and can be compiled to WebAssembly.

Use cases

• embed a JavaScript scripting engine in a Rust application
• run untrusted JS sandboxed inside Rust
• parse and evaluate ECMAScript code programmatically
• compile a JS engine to WebAssembly for the browser
• experiment with JavaScript language implementation in Rust
• use a JS REPL from the command line

When to choose

• you need to embed a JS engine in Rust without a C dependency like V8
• you want a lightweight, pure-Rust ECMAScript interpreter
• you need a JS engine that compiles to WebAssembly
• you're building tooling that must parse or evaluate JavaScript

When to avoid

• you need 100% ECMAScript conformance or top-tier JIT performance
• you need full Node.js APIs and ecosystem compatibility
• you're building a production browser or high-throughput server runtime

Facets

library · maturity active

interpreter parser compiler programming-languages parsers developer-tools rust wasm cli cross-platform javascript-engine ecmascript embeddable lexer runtime garbage-collector

Member repositories

For agents

markdown · JSON · MCP: product_card(name="boa-dev/boa")