Can I run Ruby code online here?

Yes. This page runs Ruby in your browser using CRuby 3.4.1 via @ruby/wasm-wasi 2.10.1. Nothing needs to be installed.

Is this Ruby playground free?

Yes. The editor, runtime and examples are free to use, and no account or payment method is required.

No. Code runs inside this browser tab. The sandbox blocks network access, and SkillAIVibe does not receive or store the code you type.

Free browser compiler

How the sandbox works, and its honest limits, is on the code execution and security page.

CRuby 3.4.1 via @ruby/wasm-wasi 2.10.1

Press Esc then Tab to move keyboard focus out of the code editor.

stdin (one value per line, read by gets)

Output will appear here after you run your code.

A blank editor is the hard place to start. The Ruby exercises hand you a program that already runs and ask you to change one thing.

Can I run Ruby code online here?: Yes. This page runs Ruby in your browser using CRuby 3.4.1 via @ruby/wasm-wasi 2.10.1. Nothing needs to be installed.
Is this Ruby playground free?: Yes. The editor, runtime and examples are free to use, and no account or payment method is required.
Is my Ruby code uploaded?: No. Code runs inside this browser tab. The sandbox blocks network access, and SkillAIVibe does not receive or store the code you type.