# Online Elixir compiler
# Write Elixir code in this online editor and run it
defmodule Hello do
def greet(name) do
IO.puts "Hello, #{name}!"
end
end
Hello.greet("Tutorsbot")
Elixir is a functional, concurrent language built on the Erlang VM. Run Elixir code instantly in your browser.
Quick Elixir Example
IO.puts "Hello, Tutorsbot!"Paste the snippet into the editor above and hit Run to see the output instantly.
What is Elixir?
Elixir is a functional, concurrent language built on the Erlang Virtual Machine (BEAM). It leverages Erlang's thirty-year-old, battle-tested process model — the same runtime that powers WhatsApp, Discord, and the entire Ericsson telecom stack — to deliver low-latency, fault-tolerant services with hot-code reloads.
Why run Elixir in the browser
Installing Erlang + Elixir + Mix takes five-plus minutes and a 200MB+ toolchain on most platforms. A browser sandbox is faster for trying a pattern match, validating a GenServer skeleton, or teaching the language at a workshop where attendees just want to see what an actor looks like.
Common Elixir tasks
Phoenix web apps with real-time channels and Presence, OTP behaviours (GenServer, Supervisor, Application), Broadway data pipelines, Nerves firmware for embedded devices, and machine-learning pre-processing via the Nx tensor library. The sandbox runs Elixir.
Getting started with Elixir
Paste a snippet — defmodule H do; def greet(n), do: IO.puts "hi, #{n}"; end; H.greet("Tutorsbot") — hit Run, see stdout. The highlighter recognises Elixir idioms: the pipe operator |>, sigils ~r/regex/ and ~w(a b c), the keyword-list shorthand [key: value], and pattern matching with <>.
What Is an Online Elixir Compiler?
An online Elixir compiler runs on the same BEAM virtual machine that backs WhatsApp and Discord, so pattern matching, the pipe operator and immutable data structures all behave exactly as they would in a local iex session — without installing Erlang/OTP and Mix first. Output appears in the panel within seconds of hitting Run, sessions autosave, and a shareable link beats pasting a GenServer stack trace into a chat message. Use it as a free Elixir interpreter for a one-off pattern-match check, or as the easiest way to run Elixir code in the browser while you're still deciding whether OTP's supervision trees are the right fit for a problem.
Elixir's productivity-focused syntax draws a lot of comparisons to Ruby, so the Online Ruby Compiler is worth having open, and for the JavaScript side of a Phoenix LiveView project, the Online JavaScript Compiler is one click away.
Run Elixir Code Online - Erlang-VM Pattern Matching Without OTP Setup
A fresh Erlang, Elixir and Mix install is a 200MB-plus toolchain and a few minutes of setup before you can run a single pattern match. That's a lot of ceremony for testing a pipe chain or a case expression — paste or write Elixir code in the editor instead, hit Run or Ctrl+Enter, and watch the output appear below exactly as it would in iex. It's a good fit for workshop demos too: attendees see what a BEAM process looks like without anyone installing anything.
Building a Phoenix backend with a Go-based service alongside it? The Online Go Compiler runs on the same editor, and the rest of the languages are on the Online Compiler hub.
Free Elixir Compiler vs Installing Elixir Locally
Getting Erlang/OTP set up correctly by hand is notoriously finicky across operating systems, with version managers like asdf doing a lot of the heavy lifting that still occasionally breaks. This free online Elixir compiler sidesteps all of it — no Erlang version to match, no Mix project to scaffold, just a tab and an editor. The local toolchain is worth the setup once you're running a real Phoenix app with Ecto and a database behind it; for checking a GenServer callback in isolation, it's unnecessary weight.
The Online Go Compiler is a solid companion for backend services written alongside Elixir, and the full catalogue is on the free online compiler hub.
Why use the Elixir online compiler?
- Elixir
- Erlang VM
- Functional programming
- Concurrent
Frequently Asked Questions
- Is the Elixir online compiler free?
- Yes — Tutorsbot's Elixir compiler is completely free. No account required, no installation, and no usage limits.
- Do I need to install Elixir?
- No. The Elixir compiler runs entirely in your browser. No runtime, no SDK, no PATH configuration. Open the page and start coding.
- Is my Elixir code saved between sessions?
- Yes — your code autosaves to your browser's local storage so you can resume where you left off. You can also generate a shareable URL.
- Can I share Elixir code with others?
- Yes. Click the Share button to copy a URL that encodes your script. Anyone with the link can open and run it instantly — no account required on their end.
- Is the Elixir compiler safe to use?
- Absolutely. Every program runs in an isolated sandbox. Your local system is never exposed to the executed code, and nothing is persisted after the execution window.
Related Online Compilers
Switching languages mid-project? Every compiler below runs on the same zero-setup editor — open a tab and you are coding in seconds.
- Online Python Compiler — Data science, AI/ML, automation & scripting
- Online JavaScript Compiler — Web, server-side & full-stack development
- Online Groovy Compiler — JVM scripting & automation
- Online Deno Compiler — Modern JavaScript runtime
- Online Octave Compiler — Numerical computing
Tutorsbot vs. Other Elixir Online Compilers
Programiz, OneCompiler, OnlineGDB and JDoodle are the online Elixir compilers people compare most often. Here is how Tutorsbot's Elixir compiler stacks up.
| Compiler | Editor | Signup | Known for |
|---|---|---|---|
| Tutorsbot | Monaco (VS Code engine) with syntax highlighting | Never required | 34+ languages in one professional editor, shareable URLs |
| Programiz | Basic code editor | Not required to run | Beginner-friendly layout, paired with its own tutorials |
| OneCompiler | Basic code editor | Not required to run | Broad language coverage in a lightweight editor |
| OnlineGDB | Editor with a step-through debugger | Not required to run | GDB-based visual debugging (breakpoints, variable inspection) |
| JDoodle | Basic code editor | Not required to run | Self-reports 110+ languages, plus an API for embedding compilers |
Comparison based on each platform’s own publicly listed features as of September 2026. Feature sets change — verify current details on each provider’s own site before relying on them.