nowfound

Life & fun · alternatives · 2026

BU

24 alternatives to Browsercraft – Unmodified Minecraft in the browser

CheerpJ: a WebAssembly JVM running unmodified Java in the browser - Minecraft 1.2.5 proof-of-concept demo.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Browsercraft – Unmodified Minecraft in the browser launched in 2024; newer entries below may have overtaken it.

  1. 1UJ

    Leaning Technologies - We bring applications to the Web.

    2017 · cheerpjdemos.leaningtech.com · its alternatives →

  2. 2AW

    2017 · funkykarts.rocks · its alternatives →

  3. 3

    Hi HN! Thanks for your attention to my post. It was a big challenge to run most of Node.js packages in browser, fast moreover. Virtual File system, resolve import/export. I got cold many times, depressions, burned out, yet still alive and finished it. Many guys helped me with an advice. Many users give a lot of positive feedback. There are 200,000 monthly unique users. I work full time now because of the freemium business model. To be honest - I am happy after many years of hard work.

    2022 · playcode.io · its alternatives →

  4. 4

    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. 5

    This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

    2024 · github.com · its alternatives →

  6. 6IB

    I've been working on an MMORPG that is now in alpha as a solo developer. Here are the major open source technologies that I use: Blender - 3D modeling software for creating the overall environment and every game object. I've gotten a lot of CC and Public Domain assets from https://poly.pizza GLTF - I export assets from blender to the GLTF asset format JSON - I write a JSON config for every game object that describes things like its name, its interactions, its collisions, etc. Node.js exporter - I iterate over the environment and every asset to create a scene hierarchy. I use…

    2024 · alpha.reconquer.online · its alternatives →

  7. 7

    Linux virtual machine, running in the browser via HTML5/WebAssembly. Networking and graphics supported.

    2021 · repl.leaningtech.com · its alternatives →

  8. 8

    Show HN: TinyWasm - A tiny WebAssembly Runtime written in Rust Hi HN! I'm excited to share TinyWasm (https://github.com/explodingcamera/tinywasm), a WebAssembly Interpreter I developed for my final university project. The main goal of this project was to deepen my understanding of WebAssembly and interpreter design. TinyWasm successfully passes all the official WebAssembly 1.0 tests and also includes features from future proposals such as like bulk memory operations. Initially more of a research project, TinyWasm focuses on simplicity and portability. It has minimal…

    2024 · github.com · its alternatives →

  9. 9

    Modd.io is a collaborative game editor that runs in browser. It's kind of like Figma for game dev. We made this engine low-code and multiplayer-first, so developeres can quickly prototype casual multiplayer games. I hope some of you guys will find this useful. Would love to hear feedback also. Thank you. Engine Demo: https://www.modd.io

    2023 · github.com · its alternatives →

  10. 10

    I always believe in using what one makes, which is unfortunate because I made Monocraft. For the past year I've been stuck looking at those pixels while I code, so over the weekend I tried my hand at making a version of Monocraft that was more legible. Introducing Miracode, a Minecraft programming font that is actually usable! Using a custom algorithm, I've converted adjacent pixels from the original font into strokes, which allow for a more smooth look while maintaining that Minecraft-y look. Give it a try and let me know what you think!

    2024 · github.com · its alternatives →

  11. 11

    A self-hostable Wasm sandbox for JavaScript workers.

    Jun 2026 · kyushu.dev · its alternatives →

  12. 12WM
  13. 13

    The complete Java runtime for modern browsers

    2024 · cheerpj.com · its alternatives →

  14. 14
    PlayJS▲138

    Playground JavaScript web, now with superpowers

    2023 · its alternatives →

  15. 15CX

    Run anything in the browser with Leaning Technologies

    2020 · leaningtech.com · its alternatives →

  16. 16

    Run KolibriOS, Linux or Windows 98 in your browser

    2022 · copy.sh · its alternatives →

  17. 17

    Earlier this year, we released our open-source game engine [0] built with Rust, WebAssembly, and WebGPU. Today, we’re happy to announce the Ambient platform, which brings web deployment, server hosting, and more to the runtime. With Ambient, you can make a game, deploy it to the browser in one command, share your URL and instantly play with others, no downloads or installs needed. Our WASM use is innovative; it is being used as both a sandboxed runtime for user code, and as a way to run the entire Ambient runtime in the browser. This, paired with our ECS data model, enables a highly modular…

    2023 · ambient.run · its alternatives →

  18. 18

    Minecraft Modding Software

    2015 · learntomod.com · its alternatives →

  19. 19

    This experiment has ended. Thanks for being part of it!

    2015 · verizoncraft.github.io · its alternatives →

  20. 20
    BrowserPod for Node.jsfree tier, from $20/mo▲19

    Run AI code safely in a browser-based serverless sandbox.

    Feb 2026 · browserpod.io · its alternatives →

  21. 21

    Browser-based MMO universe. Minecraft in 2D.

    2014 · manyland.com · its alternatives →

  22. 22

    Hi everyone, I built a runtime to isolate untrusted code using wasm sandboxes. Basically, it protects your host system from problems that untrusted code can cause. We’ve had a great discussion about sandboxing in Python lately that elaborates a bit more on the problem [1]. In TypeScript, wasm integration is even more natural thanks to the close proximity between both ecosystems. The core is built in Rust. On top of that, I use WASI 0.2 via wasmtime and the component model, along with custom SDKs that keep things as idiomatic as possible. For example, in Python we have a simple decorator:…

    Feb 2026 · github.com · its alternatives →

  23. 23WV

    Maze generator and solver in JavaScript and Wasm

    2022 · wasm-on-the-edge.vercel.app · its alternatives →

  24. 24

    New binary format for compiling applications for the web

    2015 · github.com · its alternatives →

Also compare

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 →