Browsercraft – Unmodified Minecraft in the browser

What it does

This is a proof-of-concept demo of Minecraft 1.2.5 running unmodified in the browser. CheerpJ is a WebAssembly JVM for the browser that can run any Java application, applet and library in the browser. Java 8, 11 and 17 are currently supported. Advanced features such as multithreading, reflection and custom classloaders are also fully supported, for more information you can join our Discord . Browsercraft runs unmodified Minecraft (version 1.2.5) in the browser using CheerpJ , a Java runtime for modern browsers. The experience is intentionally limited to 3 minutes; please refer to minecraft.net for the full game. It is not a replacement for the official Minecraft, nor a reimplementation in…from browsercraft.cheerpj.com

• UJ
  Unmodified Java Swing apps in any browser, fully client side2017 · cheerpjdemos.leaningtech.com · ▲29

  Leaning Technologies - We bring applications to the Web.

• AW
  A WebAssembly game demo2017 · funkykarts.rocks · ▲251
• 
  I've been making JavaScript sandbox alone for 6 years2022 · playcode.io · ▲397

  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.

• 
  Firefox in WebAssemblyJul 2026 · developer.puter.com · ▲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…

• 
  Execute JavaScript in a WebAssembly QuickJS sandbox2024 · github.com · ▲206

  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…

• 
  CheerpX – x86 Node.js/python3/Ruby REPL in browser via WebAssembly JIT2021 · repl.leaningtech.com · ▲88

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

• 
  SimCity, but with Permits▲905

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 1d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Flipner AI▲1,623

  Capture your ideas & craft texts with AI's touch

  AI · 2024 · flipner.webflow.io

• 
  Typeframes▲1,315

  Video creation for makers

  Work · 2024 · revid.ai

• 
  Superlist▲1,252

  The task layer for your AI agents

  Work · 2024 · superlist.com

• 
  MarketingIdeas.com▲1,230

  Never run out of marketing ideas ever again

  Growth · 2024 · marketingideas.com

• 
  Layers▲1,198

  A home for designers

  Work · 2024 · layers.to

• 
  Heyday▲1,178

  AI copilot for your own research, notes & conversations

  AI · 2024 · heyday.xyz