Three simple steps
How to use this tool?
This free online converter translates OCaml source code into Grain in three simple steps.
- Step 1
Add your OCaml code
Type, paste, or upload the OCaml code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Grain.
- Step 3
Review the result
Review, copy, or download the resulting Grain code from the output editor.
Language comparison
Key differences between OCaml and Grain
| Characteristic | OCaml | Grain |
|---|---|---|
| Syntax | Uses a traditional ML-style syntax with significant whitespace and explicit type annotations; mature and expressive. | Inspired by OCaml but designed to be simpler and more approachable, with some syntax differences for WebAssembly compatibility. |
| Paradigm | Multi-paradigm: functional, imperative, and object-oriented programming supported. | Primarily functional, with some support for imperative constructs; designed for functional-first programming. |
| Typing | Statically typed with strong type inference and a powerful type system. | Statically typed with type inference, but the type system is simpler and less mature than OCaml's. |
| Performance | Compiles to efficient native code and bytecode; generally high performance for a functional language. | Compiles to WebAssembly, optimized for web and cross-platform environments; performance depends on WebAssembly runtime. |
| Libraries and frameworks | Rich ecosystem with many libraries and frameworks, especially for systems programming, compilers, and research. | Smaller and newer ecosystem; limited libraries focused on WebAssembly and web development. |
| Community and support | Large, established community with extensive documentation, forums, and academic support. | Small but growing community; support mainly through official channels and Discord. |
| Learning curve | Moderate to steep, especially for those new to functional programming or ML-family languages. | Designed to be beginner-friendly, with a gentler learning curve and simpler syntax. |
Common questions
Frequently Asked Questions
How do I convert OCaml to Grain?
Paste your OCaml code into the input box, confirm the languages are set to OCaml and Grain, and click Convert. CodeConvert AI analyzes your OCaml code and generates equivalent Grain code in seconds, preserving the original logic and structure.
What are the main differences between OCaml and Grain?
OCaml and Grain differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each OCaml construct to its closest Grain equivalent. See the comparison table below for the key differences between OCaml and Grain.
Is the converted Grain code accurate?
The AI produces high-quality Grain code that preserves the behavior of your original OCaml code and follows Grain conventions. It handles common patterns, data structures, and idioms for both OCaml and Grain. For large or performance-critical code, review and test the Grain output before using it in production.
Can I convert an entire OCaml project to Grain?
You can convert OCaml 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 OCaml to Grain. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Grain back to OCaml?
Yes. CodeConvert AI converts in both directions, so you can convert Grain to OCaml just as easily using our Grain to OCaml converter. Try the Grain to OCaml Converter
Is the OCaml to Grain 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 OCaml to Grain 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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