Open-source in-browser code editor/executor with REPL, 10+ languages

In plain words

This is an open-source in-browser code editor and executor that supports over 10 programming languages with a built-in REPL. The backend uses Elixir and Phoenix to run code in Docker containers via WebSocket, enabling collaborative coding. It's designed for developers who want to write and test code directly in their browser. The creator is working on enhancing security through improved container isolation.

written from the facts on this page · September 2026

From the sources

Contribute to logicboard/logicboard development by creating an account on GitHub.

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  Open-source in-browser code editor and REPL in 10+ languages2023 · github.com · ▲5

  I am super excited to open-source the code executor behind logicboard.com - an in-browser collaborative code editor. The backend is written in Elixir+Phoenix and implements a WebSocket API to execute code in docker containers. Next steps include making this more secure, I am considering Google's gVisor to implement better isolation between containers and the host kernel.

• IM
  I made an in-browser code editor with code replay and REPL2023 · logicboard.com · ▲87

  I made a Logicboard.com — A collaborative code editor with code-replay feature. Code-replay lets you run the coding session like a movie, I wrote a blog post on how I implemented this: https://logicboard.com/blog/code-replay You can try out the demo here: https://logicboard.com/demo/:replay And play around with the code editor here: https://logicboard.com/demo/ Logicboard also has an REPL shell, just type "start()" and hit enter in the output area.

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