Ruby Compiler

Ruby Playground

Snippets Hello World Variables & Types Arrays Hashes Loops Blocks & Lambdas OOP – Class OOP – Inheritance Modules & Mixins Exceptions Fibonacci

Dracula Monokai Tomorrow Night GitHub Dark

Snippets Hello World Variables & Types Arrays Hashes Loops Blocks & Lambdas OOP – Class OOP – Inheritance Modules & Mixins Exceptions Fibonacci

Dracula Monokai Tomorrow Night GitHub Dark

main.rb

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Loading Ruby WASM engine…

Initializing… Opal Ruby · 100% Client-Side

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About

Runs real Ruby entirely in your browser using Opal.js compiler. 100% client-side — your code never leaves your browser, no server needed.

puts / print / p classes modules blocks exceptions Enumerable

Limitations

• gets / STDIN not supported
• File I/O unavailable (sandboxed browser)
• require 'json' / native gems unavailable
• 15-second execution timeout

Tips

• Use puts to print, p to inspect
• Share encodes your code in the URL
• Save downloads a .rb file
• Drag the divider to resize panels