How to use this tool?

This free online converter lets you convert code from Ruby to Crystal in a click of a button. To use this converter, take the following steps -

  1. Type or paste your Ruby code in the input box.
  2. Click the convert button.
  3. The resulting Crystal code from the conversion will be displayed in the output box.

Examples

The following are examples of code conversion from Ruby to Crystal using this converter. Note that you may not always get the same code since it is generated by an AI language model which is not 100% deterministic and gets updated from time to time.

Example 1 - Is String Palindrome

Program that checks if a string is a palindrome or not.

Ruby

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Crystal

Example 2 - Even or Odd

A well commented function to check if a number if odd or even.

Ruby

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Crystal

Key differences between Ruby and Crystal

CharacteristicRubyCrystal
SyntaxRuby has a more flexible and expressive syntax compared to Crystal.Crystal has a syntax similar to Ruby, but with stricter type annotations.
ParadigmRuby is a dynamically-typed, object-oriented language with support for functional programming.Crystal is a statically-typed, object-oriented language with support for metaprogramming.
TypingRuby is dynamically-typed, meaning that variable types are determined at runtime.Crystal is statically-typed, meaning that variable types are checked at compile-time.
PerformanceRuby is generally slower compared to Crystal due to its dynamic nature.Crystal is designed to be statically compiled and can achieve performance similar to C.
Libraries and frameworksRuby has a vast ecosystem of libraries and frameworks, including Ruby on Rails.Crystal has a smaller ecosystem compared to Ruby, but can also use some Ruby libraries.
Community and supportRuby has a large and active community with extensive documentation and support.Crystal has a growing community, but it is smaller compared to Ruby.
Learning curveRuby has a relatively gentle learning curve, especially for beginners.Crystal has a steeper learning curve compared to Ruby, mainly due to its stricter typing and metaprogramming features.