Life & fun · alternatives · 2026

My Turbo Pascal compiler in JavaScript is a JavaScript-based implementation of a Turbo Pascal compiler. It allows users to write and run Turbo Pascal code in a web browser environment. The project is designed for… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. My Turbo Pascal compiler in JavaScript launched in 2013; newer entries below may have overtaken it.

1. 1
   Joy – a Go to JavaScript compiler▲201

   Matt Mueller's personal website for sharing what I've learned about programming, design, entrepreneurship and life.

   2017 · mat.tm · its alternatives →

2. 2
   My x86 emulator written in JavaScript▲765

   Run KolibriOS, Linux or Windows 98 in your browser

   2013 · copy.sh · its alternatives →

3. 3
   Simple Pascal interpreter written in Swift▲103

   Simple Swift interpreter for the Pascal language inspired by the Let’s Build A Simple Interpreter article series. - igorkulman/SwiftPascalInterpreter

   2018 · github.com · its alternatives →

4. 4IW
   I wrote a .NET to JS compiler. Here's an XNA demo compiled to JS.▲103

   2011 · hildr.luminance.org · its alternatives →

5. 5
   Jaws – a JavaScript to WASM ahead-of-time compiler▲290

   I've open sourced a JavaScript to WASM compiler. It's an experimental tool, but given the semantics I already implemented, I'm fairly certain I am able to eventually cover 100% of JavaScript spec. Any ideas, questions or critique welcomed! If you are interested in WASM, especially with new proposals like WASM GC or exception handling, it might be a good source of seeing these features in action - the project has a few thousand lines of hand written WAT so far.

   2024 · github.com · its alternatives →

6. 6CT
   C#-to-JavaScript compiler powered by Microsoft Roslyn▲155

   2015 · duoco.de · its alternatives →

7. 7
   ScrapScript – A tiny functional language for sharable software▲503

   Hi friends, I started casually working on scrapscript in 2015. I built a few compilers over the years to test out various ideas/implementations, and I think I'm finally happy with the overall design. The code is not public yet. Email me at [email protected] if you're interested in joining the core team later this year. Let me know if you have any questions or feedback :)

   2023 · scrapscript.org · its alternatives →

8. 8
   How to write a tiny compiler▲224

   Write your own compiler: introduction. Code genetation. AST. Abstract syntax tree. lisp. javascript.

   2017 · blog.klipse.tech · its alternatives →

9. 9
   myCompiler▲122

   Run your favourite programming languages online

   2019 · mycompiler.io · its alternatives →

10. 10
    Fast.js – faster reimplementations of native JavaScript functions▲323

    Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

    2014 · github.com · its alternatives →

11. 11
    FratmScript▲58

    JavaScript ma comme si deve 🤌

    Jan 2026 · kkratterf.github.io · its alternatives →

12. 12
    Pascal to LLVM Compiler in Haskell▲61

    A Pascal to LLVM compiler in Haskell . Contribute to sam46/Paskell development by creating an account on GitHub.

    2020 · github.com · its alternatives →

13. 13
    Faster.js – a micro-optimizing JavaScript compiler▲89

    faster.js is a Babel plugin that compiles idiomatic Javascript to faster, micro-optimized Javascript. - vzhou842/faster.js

    2018 · github.com · its alternatives →

14. 14MN
    My new JavaScript MVC framework▲304

    2014 · lhorie.github.io · its alternatives →

15. 15
    My C compiler compiled itself▲275

    One of the most challenging projects of my life :)

    2024 · github.com · its alternatives →

16. 16RU
    Run unsafe user generated JavaScript in the browser▲113

    I needed a way to let users write JavaScript to create plugins for a site I'm building. I couldn't find a solution I was happy with, so ended up building one that run's it in a web worker on a separate domain from your main site. Hopefully I haven't missed anything. If so, please let me know! My website has an interactive demo you can write code in the browser textarea, and see the output on the right. Interactive Demo: https://workerbox.net/ Github: https://github.com/markwylde/workerbox

    2022 · workerbox.net · its alternatives →

17. 17JP
    JavaScript Program Synthesis▲139

    2021 · grgv.xyz · its alternatives →

18. 18ID
    I designed a language for code golf, compiling to Common Lisp▲102

    2013 · rhoscript.com · its alternatives →

19. 19
    A self-hosted js compiler in 1k loc▲47

    Minimal self-hosted JavaScript compiler in 1k lines of code - maierfelix/mini-js

    2017 · github.com · its alternatives →

20. 20TF
    Transcrypt – Fast, small Python 3.5 to JavaScript transpiler▲121

    The Transcrypt Python to JavaScript compiler makes it possible to program lean and fast browser applications in Python. Transcrypt applications can use any JavaScript library and can also run on top of Node.js or be used in combination with Django.

    2016 · transcrypt.org · its alternatives →

21. 21
    Compiling C in the browser using WebAssembly▲174

    We’ve reached a major milestone in making any software run with WebAssembly. Thanks to the newest release of Wasmer (4.4) and the Wasmer JS SDK (0.8.0) ...

    2024 · wasmer.io · its alternatives →

22. 22OS
    Open Source emulator in Javascript that runs Linux▲65

    2012 · ubercomp.com · its alternatives →

23. 23IB
    I built an online programming language▲67

    2021 · codigo.so · its alternatives →

24. 24
    Transputer emulator in JavaScript (fast enough to be useful)▲55

    Transputer emulator written in Javascript running my operating system from 1995.

    2025 · nanochess.org · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →