Ruby

Execute code with CRuby 4.0.0 (ruby.wasm 2.10.1) inside a dedicated Wasm Worker.

Package: @sandbox-workers/ruby. Code is a script: the value of the last expression is the result. Supports Enumerable and the bundled standard library. The JavaScript bridge is disabled. gem installation and arbitrary native extensions are unavailable.

Engine: CRuby 4.0.0 compiled to Wasm by ruby.wasm 2.10.1 (@ruby/4.0-wasm-wasi).

Ruby is stateless-only — its runtime Worker always answers contexts: false, so it works in stateless mode only; see Code contexts for why.

Deploy

Or, with the CLI:

pnpm dlx @sandbox-workers/cli init ruby my-sandbox

See deployment setup and Service Bindings. The template requires a Paid plan and creates no public URL.

Example

Env vars:

{ "NAME": "world" }

Code:

name = ENV.fetch("NAME", "world")
puts "Hello from Ruby!"
{message: "Hello, #{name}!", squares: (0..5).map { |x| x*x }}

Every request gets a fresh engine instance. State does not persist between executions. Consult limits for fuel, memory, and output budgets.

License notice

Before use or redistribution, review this runtime’s LICENSE and THIRD_PARTY_NOTICES.md. Bundled interpreters retain their upstream licenses. The package includes the applicable notices in its licenses/ directory.