bellard/mquickjs

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

6130 stars · 238 forks observed · 2026-08-28

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

MicroQuickJS is a compact JavaScript engine written in C, derived from QuickJS, designed for embedded systems with as little as 10 kB of RAM and ~100 kB of ROM. It supports a strict-mode subset of JavaScript close to ES5 and includes a REPL (mqjs) with bytecode compilation for offline execution.

Use cases

• run javascript on microcontrollers with 10 kB of ram
• embed a javascript interpreter in a c application
• precompile javascript to bytecode for embedded devices
• evaluate scripts on resource-constrained iot hardware
• sandbox small scripts with strict memory limits
• run a javascript repl on an embedded board

When to choose

• you need a tiny, fast JavaScript engine for embedded or memory-constrained targets
• you want bytecode precompilation to save ROM and startup time
• you prefer a stricter ES5-like subset that still runs on other engines
• you want a tracing GC and stackless VM for predictable memory use

When to avoid

• you need full modern ES6+ JavaScript features
• you need high compatibility with browser or Node.js ecosystems
• you want a mature, permissively licensed engine without license ambiguity
• you need top-tier JIT performance for compute-heavy workloads

Facets

library · maturity active

interpreter compiler programming-language embedded programming-languages embedded-systems developer-tools embedded windows c cli javascript-engine es5-subset tracing-garbage-collector bytecode low-memory quickjs iot linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="bellard/mquickjs")