Online Crystal 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 Crystal to Gleam in a click of a button. To use this converter, take the following steps -
- Type or paste your Crystal 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 Crystal and Gleam
| Characteristic | Crystal | Gleam |
|---|---|---|
| Syntax | Ruby-like, clean and expressive, easy for Ruby developers to read and write. | Erlang/Elm-inspired, concise and functional, indentation-based with a focus on clarity. |
| Paradigm | Multi-paradigm, primarily object-oriented with some functional features. | Purely functional, immutable data, no side effects, strong emphasis on functional programming. |
| Typing | Static, inferred typing with optional type annotations; aims for safety with Ruby-like feel. | Static, strong and sound typing with type inference; no runtime type errors. |
| Performance | Compiled to native code via LLVM, performance close to C. | Compiles to Erlang BEAM bytecode or JavaScript; performance similar to other BEAM languages, optimized for concurrency. |
| Libraries and frameworks | Growing ecosystem, includes web frameworks like Amber and Lucky, but smaller than mainstream languages. | Limited native libraries, can interoperate with Erlang/Elixir libraries, ecosystem still maturing. |
| Community and support | Active but relatively small community, good documentation, active development. | Very small and young community, enthusiastic contributors, documentation improving. |
| Learning curve | Gentle for Ruby developers, moderate for others; familiar syntax eases onboarding. | Steeper for those new to functional programming or BEAM, but simple syntax helps. |
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