Three simple steps
How to use this tool?
This free online converter translates Carbon source code into Crystal in three simple steps.
- Step 1
Add your Carbon code
Type, paste, or upload the Carbon 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.
Language comparison
Key differences between Carbon and Crystal
| Characteristic | Carbon | Crystal |
|---|---|---|
| Syntax | C++-like, designed to be familiar to C++ developers with modern improvements. | Ruby-like, highly readable and concise with a focus on developer productivity. |
| Paradigm | Multi-paradigm, primarily object-oriented and procedural. | Multi-paradigm, primarily object-oriented with functional features. |
| Typing | Static, strong typing with type inference. | Static, strong typing with type inference. |
| Performance | Aims for performance close to C++. | Performance close to C, thanks to LLVM-based compilation. |
| Libraries and frameworks | Limited, as the language is experimental and ecosystem is nascent. | Growing standard library and several web frameworks (e.g., Kemal, Amber). |
| Community and support | Small, early-stage community with limited resources. | Moderate, active open-source community with increasing adoption. |
| Learning curve | Easier for C++ developers, but limited documentation and tooling. | Gentle for Ruby developers, clear syntax and good documentation. |
Common questions
Frequently Asked Questions
How do I convert Carbon to Crystal?
Paste your Carbon code into the input box, confirm the languages are set to Carbon and Crystal, and click Convert. CodeConvert AI analyzes your Carbon code and generates equivalent Crystal code in seconds, preserving the original logic and structure.
What are the main differences between Carbon and Crystal?
Carbon 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 Carbon construct to its closest Crystal equivalent. See the comparison table below for the key differences between Carbon and Crystal.
Is the converted Crystal code accurate?
The AI produces high-quality Crystal code that preserves the behavior of your original Carbon code and follows Crystal conventions. It handles common patterns, data structures, and idioms for both Carbon and Crystal. For large or performance-critical code, review and test the Crystal output before using it in production.
Can I convert an entire Carbon project to Crystal?
You can convert Carbon 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 Carbon 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 Carbon?
Yes. CodeConvert AI converts in both directions, so you can convert Crystal to Carbon just as easily using our Crystal to Carbon converter. Try the Crystal to Carbon Converter
Is the Carbon 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 Carbon to Crystal without an account for up to 2 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.
More free tools