: Supports singleplayer (which may require specific browser flags to be enabled for WASM) and multiplayer through specialized WebSocket proxies.

For over a decade, "Can it run Minecraft?" has been the unofficial benchmark for computing power. But what about running it inside a browser tab —without a native Java installation, without a dedicated launcher, and on virtually any device with an operating system?

: Modern browsers cannot use standard TCP/UDP sockets for security reasons. To support multiplayer, these ports use WebSockets or WebRTC to connect to specialized proxy servers or shared worlds. Performance and Compatibility

Since Minecraft is written in Java, the browser cannot execute the code directly. It requires a Java Virtual Machine (JVM) compiled to WebAssembly.