Online JavaScript 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 JavaScript to Gleam in a click of a button. To use this converter, take the following steps -
- Type or paste your JavaScript 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 JavaScript and Gleam
| Characteristic | JavaScript | Gleam |
|---|---|---|
| Syntax | C-like, flexible, dynamic, and permissive with many ways to accomplish tasks. | Inspired by ML-family languages, concise, strict, and statically structured. |
| Paradigm | Multi-paradigm: supports functional, imperative, and object-oriented programming. | Primarily functional, with strong emphasis on immutability and purity. |
| Typing | Dynamically typed, types are checked at runtime. | Statically typed with strong type inference, types are checked at compile time. |
| Performance | Generally fast due to highly optimized engines (e.g., V8), but can be affected by dynamic typing. | Compiles to Erlang BEAM or JavaScript, performance depends on target; benefits from BEAM's concurrency model. |
| Libraries and frameworks | Extensive ecosystem with thousands of libraries and frameworks for all purposes. | Smaller ecosystem, but can interoperate with Erlang/Elixir libraries when targeting BEAM. |
| Community and support | Large, mature, and active global community with abundant resources and support. | Small but growing community, less support and fewer resources compared to JavaScript. |
| Learning curve | Relatively easy to start, but quirks and dynamic nature can make mastery challenging. | Steeper learning curve due to functional paradigm and static typing, but simpler syntax can help. |
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