Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Interactive Go REPL in Your Browser with WebAssembly launched in 2018; newer entries below may have overtaken it.

1. 1
   WebAssembly▲86

   New binary format for compiling applications for the web

   2015 · github.com · its alternatives →

2. 2AW
   A WebAssembly game demo▲251

   2017 · funkykarts.rocks · its alternatives →

3. 3IW
   I wrote a book about WebAssembly▲410

   Hey HN! I've been working on a book about WebAssembly over the last few months, and it's finally available at http://levelupwasm.com! Why a book on WebAssembly you ask? Well... WebAssembly is awesome (obviously ) but it's certainly not the easiest thing to learn. So I wrote this book as a practical intro to using WebAssembly in your web apps. I would appreciate any feedback!

   2019 · its alternatives →

4. 4
   Firefox in WebAssembly▲273

   This is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly. Here are a few things you might find interesting: - This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets. - There is a novel WASM->JS JIT for experimental site speedup - This port cost over 25k in opus/fable tokens for debugging and JIT research This was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built…

   Jul 2026 · developer.puter.com · its alternatives →

5. 5GT
   Go Template Preview – Powered by WebAssembly▲102

   Quickly test and visualize your Go templates live. Template and data never leave your browser unless you share.

   2022 · gotemplate.io · its alternatives →

6. 6GP
   Go playground powered by WASM that runs in the browser▲140

   2021 · go-playground-wasm.vercel.app · its alternatives →

7. 7WG
   Write Go code in JavaScript files▲158

   I built a Vite plugin that lets you write Go code directly in .js files using a "use golang" directive. It compiles to WebAssembly automatically.

   Oct 2025 · npmjs.com · its alternatives →

8. 8
   Gowebly▲130

   A next-generation CLI tool to build web apps easier

   2024 · its alternatives →

9. 9
   Wasmer – A Go library for executing WebAssembly binaries▲44

   🐹🕸️ WebAssembly runtime for Go. Contribute to wasmerio/wasmer-go development by creating an account on GitHub.

   2019 · github.com · its alternatives →

10. 10
    Gondola▲69

    The web framework for Go programming language

    2014 · its alternatives →

11. 11
    Wrote a tiny WebAssembly (wat2wasm) compiler in Go▲75

    As a personal project I wrote a really tiny Wat 2 Wasm compiler in Go. Mainly for demonstrative and educational purposes. It was tough: I didn't know anything about WebAssembly internals and I'm a newbie with Go... so I tried to document it as much as I could for anyone that would like to approach the quest in the future! It misses a lot of features (that will be gradually implemented). Any feedback is welcomed!! Demo: https://luna-demo.vercel.app

    2022 · github.com · its alternatives →

12. 12CT
    C to WebAssembly in JavaScript▲6

    2017 · maierfelix.github.io · its alternatives →

13. 13
    I wrote a WebAssembly Interpreter and Toolkit in C▲105

    Web49: WebAssembly Interpeter. Contribute to FastVM/Web49 development by creating an account on GitHub.

    2023 · github.com · its alternatives →

14. 14AR
    Ast.run – WebAssembly playground▲9

    2016 · ast.run · its alternatives →

15. 15WC
    WebAssembly Calling Card – visual creativity with WASM▲42

    2020 · wacc.rancidbacon.com · its alternatives →

16. 16GA
    Gondola, a Django like web framework in Go▲7

    2014 · gondolaweb.com · its alternatives →

17. 17WS
    Webassembly.sh – WebAssembly WASI Terminal on your Browser▲8

    WebAssembly.sh: an online WebAssembly terminal to run WASI modules directly on your browser

    2019 · webassembly.sh · its alternatives →

18. 18
    I built a web-ready synthesizer using WebAssembly and C++▲6

    2020 · youtu.be · its alternatives →

19. 19IC
    I create online gnuplot playground using WebAssembly▲8

    2024 · gnuplot.io · its alternatives →

20. 20
    Does your browser supports WebAssembly?▲11

    Does your browser support WebAssembly? Check WebAssembly support and features like SIMD, threads and more.

    2020 · wasm.joway.io · its alternatives →

21. 21
    WebAssembly System Interface (WASI) with Sockets for Go▲9

    Go v1.21, scheduled for release in August 2023, adds experimental support for the WebAssembly System Interface (WASI). It'll be possible to natively compile server-side WebAssembly applications with Go, making Go a first-class citizen along with C/C++, Rust and Zig. GOOS=wasip1 GOARCH=wasm go build ... WASI is still in preview and is missing some key features, e.g. the ability to create sockets. Some WebAssembly runtimes have taken the initiative to extend the WASI preview, enabling a wider range of applications to run as WebAssembly modules. Today, we're open sourcing our WASI library…

    2023 · github.com · its alternatives →

22. 22WC
    WebAssembly Cloud – I created a playground in the browser using Rust▲5

    2021 · webassembly.cloud · its alternatives →

23. 23HA
    HTML5 and Canvas demo written in Go▲8

    2016 · tidwall.com · its alternatives →

24. 24AB
    Alloy – Boilerplate for building web applications with Go▲7

    2017 · growthmetrics.io · 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 →