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Products that do what Open-source in-browser code editor and REPL in 10+ languages does

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.

  1. 1OS

    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.

    2023 · github.com

  2. 2IM

    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.

    2023 · logicboard.com

  3. 3
    Repl.it399

    Code and deploy apps in any language right from your browser

    2018

  4. 4EA

    Hi HN! I've been working on a code editor and I think that it's mature enough to catch some interest. It's using a custom GPU accelerated GUI written in C++. Currently implements some interesting features: LSP, terminal, auto-completion, linters, formatters, custom keybindings, plugins and more. It's a hobby project but still intends to be an alternative to other popular code editors like Sublime, Kate, Lapce, Lite XL (and takes inspiration from them). The project was born as a playground for the GUI I'm developing (eepp GUI) and is advanced enough to currently be my main code editor, but…

    2023 · github.com

  5. 5

    VS Code in the browser for everyone

    2021

  6. 6
    Code.xyz382

    The online code editor for building APIs in a single click.

    2018

  7. 7DI
  8. 8CA

    Hey guys! I’ve been working on a web app called CodeCafé—a collaborative, browser-based code editor inspired by VS Code and Replit, but with no downloads, no sign-up, and zero setup. You just open the link and start coding—together. The frontend is built with React and TypeScript, and the backend runs on Java with Spring Boot, which handles real-time editing via WebSockets. For syncing changes, I’m using Redis along with a custom Operational Transformation system (no third-party libraries!!!). The idea came after I found out a local summer school was teaching coding using Google Docs (yes,…

    2025 · github.com

  9. 9

    Control your computer with natural language

    2023

  10. 10CC
  11. 11

    The open-source alternative to Webflow

    Apr 2026 · ycode.com

  12. 12

    An online Javascript code editor 🤖

    2019

  13. 13

    Free and open-source online code editor.

    2020

  14. 14

    In-browser REPL and compiler for programmer interviews.

    2014

  15. 15

    Code, preview, share, and host with AI Power

    2025

  16. 16IV

    Have been building a web IDE & browser based code editor and v2.0 has now launched. Contains a whole load of features beyond just code highlighting such as online & offline use, code completion, type boosting, Emmet, database management, find & replace builder, auto backups, Github syncing and a whole lot more. Oh, and it's free & open source. Any and all feedback welcomed.

    2013 · icecoder.net

  17. 17

    You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result. It currently supports around 1.4k problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others. The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned. Made in Haskell!

    19d ago · github.com

  18. 18WN

    Hi HN! I’m so excited to show my first open-source project and first post here. I initially started this project to learn Go language, it is an experimental project. The main goal is to track the adventure of a WebRTC stream from start to finish, by debugging the project or tracking the output at console. By trying out this project, you will deep dive into the steps which are taken while starting up a WebRTC session, and more. It consists of a web UI (TypeScript) and a server back-end (Golang) projects. They can run on Docker containers, in development mode or production mode, you can find…

    2022 · github.com

  19. 19IM

    Hey developers I think we're tired of copying and pasting our codes and sharing links using PasteBin, GithubGist, or Slack. What if you could share the codes without copying the link and share them right from your favorite editor? That was the motivation for creating TurboGist. Right now, it's still in the MVP stage, and I'm trying to gather feedback from developers like you. It's available as a beta in the VS Code Extension store. Can you guys check this out? It'd help me a lot. You don't need to pay any penny, 100% FREE. However, I'm working on introducing a self-hosted feature. Besides, a…

    2025 · turbogist.dev

  20. 20OC

    2016 · code.woboq.org

  21. 21CW
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    repl.it109

    Online code repl for pretty much any language.

    2015

  23. 23AC

    When the startup I was working for shut down, I knew it would probably be a while before my health allowed me to commit to a new role, so I decided to start working on some personal projects to keep my mind active and engaged. With AI-augmented VS Code forks being all the rage at the time, I wanted to take a slightly different angle on a code editor/viewer using the same core technology. That led me to building Tachi Code, a Monaco-based code editor that integrates directly into your browser as an extension to streamline your more ephemeral coding tasks, so you can spend less time…

    2025 · tachicode.dev

  24. 24

    Instant code collaboration in the browser

    2018

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