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QuickJS vs Deno: catalog facts
QuickJSDeno
Free

Free and open source under the MIT licence.

Free

The runtime is free and open source under the MIT licence. Deno Deploy, the company's…

Windows, Command line Windows, macOS, Linux, Command line
  • Very small footprint with no external dependencies
  • Nearly complete ES2025 support
  • Permissions are denied by default; a script must be granted file, network or environment access
  • TypeScript runs directly with no build step or configuration
  • Interpreter rather than a JIT engine, so slower than V8 for heavy workloads
  • Bignum extensions and the qjscalc calculator were removed
  • Some npm packages that depend on Node internals still do not work
  • A smaller ecosystem and hiring pool than Node
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.