Elixir Online Compiler
Write and run Elixir code online directly from your browser with our free Online Elixir Compiler. Test functional programming concepts, modules, pattern matching, pipelines, and other Elixir features without installing Erlang, Elixir, Mix, or configuring a local BEAM development environment.
How to Use This Elixir Compiler
- Write or paste your Elixir code
Enter your program in the Code Editor. You can test functions, modules, lists, maps, tuples, pattern matching, pipelines, and other Elixir features supported by the execution environment. - Click the Run button
Select Run to execute your Elixir program. If your code contains a syntax or runtime error, review the returned message, correct the relevant code, and run it again. - Check the Output screen
Your program result appears in the Output panel. Use the available controls to copy, download, or delete the output before testing another program.
Key Features
- Free Online Elixir Compiler: Write and execute Elixir programs directly from a modern web browser.
- Zero Installation: No need to install Erlang/OTP, Elixir, Mix, or configure a local BEAM environment for supported programs.
- Instant Execution: Click Run and quickly view your program output or error feedback.
- Standard Elixir Syntax: Practice functions, modules, pattern matching, recursion, immutable data, comprehensions, and pipelines.
- BEAM-Based Execution: Run supported Elixir code in an environment built around the Erlang virtual machine.
- Dark and Light Mode: Switch the Code Editor theme for comfortable coding in different lighting conditions.
- Output Controls: Copy, download, or clear generated output directly from the Output panel.
- Useful for Learning and Testing: Suitable for backend developers, functional programming students, interview practice, and quick Elixir experiments.
1. How do I print output using IO.puts?
Elixir commonly uses IO.puts/1 to print text to standard output.
Enter the code in the Code Editor, click Run, and view the result in the Output screen.
You can also print variables:
2. Do I need to install Erlang, Elixir, or Mix?
No. You can use this Online Elixir Compiler directly from your browser without installing Erlang/OTP, Elixir, or Mix for supported programs.
A local Elixir environment may still be preferable for full applications, Mix projects, dependency management, Phoenix development, testing, or programs that need unrestricted system access.
3. Which Elixir modules are supported here?
Standard Elixir modules available in the configured runtime can generally be used. Common examples include modules such as Enum, String, Map, List, and IO.
For example:
Support for external Hex packages, project-specific dependencies, or modules requiring additional services may vary.
4. Can I use pattern matching and the pipe operator in this compiler?
Yes. Pattern matching and the pipe operator |> are core Elixir features and can be used in standard Elixir programs.
This makes the compiler useful for practicing the functional programming style commonly used in Elixir applications.