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QuickJS vs Bun: catalog facts
QuickJSBun
Free

Free and open source under the MIT licence.

Free

Free and open source. The runtime core is MIT licensed with some bundled components under…

Windows, Command line Windows, macOS, Linux, Command line
  • Very small footprint with no external dependencies
  • Nearly complete ES2025 support
  • Runtime, bundler, test runner and package manager in one executable
  • Much faster startup and installs than the Node and npm equivalents
  • Interpreter rather than a JIT engine, so slower than V8 for heavy workloads
  • Bignum extensions and the qjscalc calculator were removed
  • Node compatibility is good but not complete; packages using deep internals can break
  • Younger than Node, so fewer production deployments to learn from
Downloadable app Downloadable app
Open source Open source
License: MIT License: MIT
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.