JavaScript NES emulator and emulation library.

🎮 Live demo

ℹ️ How to use cfxnes as a library

• Supported ROM images: iNES, NES 2.0.
• Supported mappers: NROM, MMC1, MMC3, UNROM, CNROM, AOROM, BNROM, NINA-001, Color Dreams.
• ROM images can be loaded from ZIP archive.
• Persistence of battery-backed RAM (game saves) in IndexedDB.
• Rendering using WebGL (with canvas API fallback).
• Fullscreen mode.
• Sound emulation using Web Audio.
• Zapper emulation using mouse.
• Gamepad support.
• Customizable key bindings.
• Plenty of configuration options.

• Chrome (last 2 versions)
• Firefox (last 2 versions)
• Opera (last 2 versions)
• IE 11, Edge >= 12
• Safari >= 9

• No sound in IE due to missing Web Audio support.
• Poor performance in IE, Edge.
• Very poor performance on mobile devices.
• Occasional graphical glitches in games using MMC3 mapper.
• See list of broken games.

• Core - Readme
• Lib - Readme / Changelog / API / Examples
• App - Readme / Changelog

Cfxnes is licensed under the MIT license.