Three simple steps
How to use this tool?
This free online converter translates F# source code into Crystal in three simple steps.
- Step 1
Add your F# code
Type, paste, or upload the F# code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Crystal.
- Step 3
Review the result
Review, copy, or download the resulting Crystal code from the output editor.
See it in action
Examples of F# to Crystal conversion
These examples show F# source code and the corresponding Crystal translation. Generated results can vary as AI models are updated.
Example 1
Is String Palindrome
Program that checks if a string is a palindrome or not.
F# code
Crystal code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
F# code
Crystal code
Language comparison
Key differences between F# and Crystal
| Characteristic | F# | Crystal |
|---|---|---|
| Syntax | F# has a functional-first syntax with support for imperative and object-oriented programming. | Crystal has a syntax inspired by Ruby with static typing and compile-time type inference. |
| Paradigm | F# supports functional, imperative, and object-oriented programming paradigms. | Crystal supports object-oriented and imperative programming paradigms. |
| Typing | F# has static typing with type inference. | Crystal has static typing with compile-time type checking. |
| Performance | F# is known for its performance and can be comparable to other statically-typed languages. | Crystal aims for high performance and has a similar performance to statically-typed languages like C or C++. |
| Libraries and frameworks | F# has a growing ecosystem of libraries and frameworks, including support for .NET libraries. | Crystal has a smaller ecosystem of libraries and frameworks compared to more established languages. |
| Community and support | F# has an active community and good support from Microsoft. | Crystal has a smaller community and may have limited support compared to more popular languages. |
| Learning curve | F# has a moderate learning curve, especially for developers familiar with functional programming concepts. | Crystal has a relatively low learning curve, especially for developers familiar with Ruby or similar languages. |
Common questions
Frequently Asked Questions
How do I convert F# to Crystal?
Paste your F# code into the input box, confirm the languages are set to F# and Crystal, and click Convert. CodeConvert AI analyzes your F# code and generates equivalent Crystal code in seconds, preserving the original logic and structure.
What are the main differences between F# and Crystal?
F# and Crystal differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each F# construct to its closest Crystal equivalent. See the comparison table below for the key differences between F# and Crystal.
Is the converted Crystal code accurate?
The AI produces high-quality Crystal code that preserves the behavior of your original F# code and follows Crystal conventions. It handles common patterns, data structures, and idioms for both F# and Crystal. For large or performance-critical code, review and test the Crystal output before using it in production.
Can I convert an entire F# project to Crystal?
You can convert F# files one at a time by pasting each file's code. For a full migration, convert each file and then review how classes, dependencies, and project structure map from F# to Crystal. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Crystal back to F#?
Yes. CodeConvert AI converts in both directions, so you can convert Crystal to F# just as easily using our Crystal to F# converter. Try the Crystal to F# Converter
Is the F# to Crystal converter free, and do I need to install anything?
Yes, it is free and runs in your browser with nothing to install and no IDE extension required. You can convert F# to Crystal without an account for up to 5 conversions per day. Sign in for free for higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro converter with more powerful AI models, a built-in chat assistant, code execution, saved conversion history, and personal notes. Every free account includes 5 credits and supports up to 25,000 characters of input per conversion, with no credit card required.
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