Online Janet to Gleam Converter
Click to select or drop your input code file here.
You can also type the input code below.
How to use this tool?
This free online converter lets you convert code from Janet to Gleam in a click of a button. To use this converter, take the following steps -
- Type or paste your Janet code in the input box.
- Click the convert button.
- The resulting Gleam code from the conversion will be displayed in the output box.
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. |
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