Three simple steps
How to use this tool?
This free online converter translates Janet source code into Gleam in three simple steps.
- Step 1
Add your Janet code
Type, paste, or upload the Janet code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into Gleam.
- Step 3
Review the result
Review, copy, or download the resulting Gleam code from the output editor.
Language comparison
Key differences between Janet and Gleam
| Characteristic | Janet | Gleam |
|---|---|---|
| Syntax | Lisp-like, uses s-expressions and parentheses, minimalistic and homoiconic. | ML-inspired, uses indentation and algebraic data types, more conventional and readable for those familiar with OCaml or Elm. |
| Paradigm | Multi-paradigm with emphasis on functional and imperative programming; supports metaprogramming and macros. | Strongly functional, with immutability and pattern matching; designed for reliability and maintainability. |
| Typing | Dynamically typed. | Statically typed with strong type inference and no nulls. |
| Performance | Interpreted, lightweight, and fast for scripting and embedding, but not as fast as compiled languages. | Compiled to Erlang BEAM or JavaScript, performance is similar to other BEAM languages and suitable for scalable backend systems. |
| Libraries and frameworks | Smaller ecosystem, with core libraries and some community packages; less extensive than mainstream languages. | Growing ecosystem, can use Erlang/Elixir libraries via interop, but native Gleam libraries are still limited. |
| Community and support | Small but active community, mostly centered around GitHub and Discord. | Small but enthusiastic community, with increasing interest due to BEAM compatibility; active on Discord and GitHub. |
| Learning curve | Steeper for those unfamiliar with Lisp syntax; easier for those with Lisp experience. | Gentle for those familiar with functional programming or ML-family languages; approachable syntax for newcomers. |
Common questions
Frequently Asked Questions
How do I convert Janet to Gleam?
Paste your Janet code into the input box, confirm the languages are set to Janet and Gleam, and click Convert. CodeConvert AI analyzes your Janet code and generates equivalent Gleam code in seconds, preserving the original logic and structure.
What are the main differences between Janet and Gleam?
Janet and Gleam differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each Janet construct to its closest Gleam equivalent. See the comparison table below for the key differences between Janet and Gleam.
Is the converted Gleam code accurate?
The AI produces high-quality Gleam code that preserves the behavior of your original Janet code and follows Gleam conventions. It handles common patterns, data structures, and idioms for both Janet and Gleam. For large or performance-critical code, review and test the Gleam output before using it in production.
Can I convert an entire Janet project to Gleam?
You can convert Janet 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 Janet to Gleam. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert Gleam back to Janet?
Yes. CodeConvert AI converts in both directions, so you can convert Gleam to Janet just as easily using our Gleam to Janet converter. Try the Gleam to Janet Converter
Is the Janet to Gleam 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 Janet to Gleam 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.
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