Open Source JavaScript Emulators
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JavaScript Emulators
View 1974 business solutionsBrowse free open source JavaScript Emulators and projects below. Use the toggles on the left to filter open source JavaScript Emulators by OS, license, language, programming language, and project status.
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Windows 95 in Electron
Windows 95 in Electron. Runs on macOS, Linux, and Windows
windows95 in Electron is a quirky, nostalgia-driven project that ports a complete emulation of Microsoft Windows 95 into a desktop application that runs on modern operating systems like Windows, macOS, and Linux. It essentially wraps an emulator — preconfigured to boot Windows 95 — inside a user-friendly app built with web technologies so developers and hobbyists can explore the look and feel of that classic OS without needing legacy hardware or complicated setup. Users can interact with familiar UI elements like the Start menu, File Explorer, and retro applications in a sandboxed environment that evokes early personal computing. Beyond being a playful trip down memory lane, the project demonstrates how emulation can be packaged using modern frameworks & how legacy operating systems can be encapsulated as distributable desktop experiences. It’s become an example of how software preservation and creative programming can intersect, inspiring others to bring historic systems to life. -
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ASAP (Another Slight Atari Player) plays and converts 8-bit Atari music (*.sap, *.cmc, *.mpt, *.rmt, *.tmc, ...) on modern computers and mobile devices.
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Java SID Player Music Library V2
C64 Emulator
This is a Commodore 64 emulator specialized for sound reproduction. It is also a SID player for music collections like HVSC and CGSC. It is a full C64 emulator and can play games of the GameBase64 project as well. -
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v86
x86 PC emulator and x86-to-wasm JIT, running in the browser
v86 is an open-source x86 PC emulator that runs entirely in the browser using WebAssembly for near-native performance. It translates x86 machine code into WebAssembly at runtime, enabling users to boot and run full operating systems without installing anything locally. The emulator supports a wide range of legacy systems, including Linux, Windows 95/98/2000, FreeDOS, and various experimental OSes. It simulates essential hardware components such as CPU, memory, VGA graphics, sound cards, network adapters, and storage controllers. Designed for both experimentation and embedding, v86 can be integrated into web apps or used as a standalone virtual machine environment. Overall, it provides a powerful way to explore operating systems, retro computing, and low-level system behavior directly from a web browser. -
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RetroPie BIOS
Full BIOS collection for RetroPie
RetroPie BIOS is a curated collection of BIOS files intended for use with the RetroPie emulation platform, providing the essential firmware required to run a wide range of classic gaming systems. The repository organizes BIOS files for numerous consoles and arcade systems, ensuring compatibility with RetroPie and related emulation environments. Each file in the collection has been verified against reference databases such as the Libretro system definitions, ensuring accuracy and reliability. The project simplifies the process of setting up emulation systems by consolidating required BIOS files into a single, organized package that users can directly integrate into their RetroPie installation. It also includes checksum validation mechanisms, allowing users to verify file integrity and ensure that BIOS files match expected standards. By maintaining a structured and verified dataset, the repository reduces common issues associated with missing or incorrect BIOS files. -
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HWSensors
All information from hardware sensors on your Mac
HWSensors is a software bundle that includes drivers and applications that allow you to access information from hardware sensors available on your Mac. FakeSMC is an open source SMC device driver/emulator developed by netkas (http://netkas.org/). NOTE: FakeSMC & Plugins starting from v915 provide additional sensors information to HWMonitor then running on Macs. By installing FakeSMC on real Mac you should consider you know what you are doing and how to recover your system if something will goes wrong. All repositories: Sourceforge, sources & downloads: https://sourceforge.net/projects/hwsensors/ BitBucket, sources & downloads: https://bitbucket.org/kozlek/hwsensors/overview Assembla, sources: https://www.assembla.com/code/fakesmc/git/nodes GitHub, sources: https://github.com/kozlek/HWSensors HWSensors Project (c) 2014 netkas, slice, usr-sse2, kozlek, navi, THe KiNG, RehabMan and others. All rights reserved. -
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FakeNES is a highly portable, Open Source NES and Famicom emulator. It runs on all modern operating systems and has an actively maintained DOS port for enthusiasts. Support for phones and other mobile platforms is under development. The majority of the project is entirely original code released under the zlib/libpng license. Contributed and third-party code is included under GNU licenses.
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quadplay
The quadplay fantasy console
quadplay✜ is a fantasy console by CasualEffects for creating and playing retro-style video games on any device. Create and play games on any laptop, desktop, tablet, or phone. Or, build your own programmable arcade machine from a Raspberry Pi, Tegra, or old computer. Create games on Windows, macOS, Linux. Play your games in any modern web browser on a laptop, desktop, tablet, phone, Raspberry Pi 4, or Jetson Nano. 60 fps @ 384 x 224 pixels = 12:7 aspect ≈ 16:9.3. 4096 sRGB (4:4:4) colors. Four players with virtual controls for D-pad and eight buttons. Local and safe online multiplayer. Supports Xbox, Playstation, SNES, Stadia, Switch, 8bitdo, touch screen, and other controllers. Hundreds of built-in sprites, sounds, and fonts. Program in PyxlScript, a friendly Python-like language. Order-independent, 4-bit alpha transparency. Native 2.5D graphics with z-order. -
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ArduSim
To be a practical Arduino simulator
ArduSim provides API level simulation of an Arduino. Arduino sketches can be run and debugged on PC with no modification. ArduGate is a sub-project of ArduSim. The agent sketch is shared. -
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QMC2 is a Qt based multi-platform GUI front end for MAME NOTE: A new version is hosted and developed at https://github.com/qmc2/qmc2-mame-fe
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JsDOSBox
JavaScript PC DOS Emulator
JsDOSBox is a JavaScript port of jDosbox (https://sourceforge.net/projects/jdosbox/) which is itself a port of DOSBox (http://www.sourceforge.net/projects/dosbox). Demonstration of JsDOSBox at http://jsdosbox.sourceforge.net Running a game demo at http://jsdosbox.appspot.com (Chrome recommended). And running DOS demos at http://retropcdemos.appspot.com. See website link below for details on recent changes and instructions. http://sourceforge.net/p/jsdosbox/home/Home/ -
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YASP (Yet Another Simple Processor) is a 8-bit microprocessor with microcontroller capabilities (I/O ports, REQ, ACK) that can be used as a small computer for educational purposes. Its development environment includes simulators and assemblers.
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Beagle Entertainment System
Turns the BeagleBone Black into a Nintendo-based retrogaming console.
The Beagle Entertainment System (BES) project is a complete filesystem image that turns the ARM-based BeagleBone Black single board computer into an embedded appliance capable of playing software for the SNES, NES, GBA, and Gameboy Color platforms. A full system image, ready to be written to a microSD card and used as-is, is available for download. Just connect your BES-enabled BeagleBone Black to your network and you can use BES's Node.js web interface to add or remove ROMs, configure gamepads, and edit ROM descriptions for the front-end GUI. There's no need to hand edit configuration files or manually copy ROM files onto the microSD card! BES source: https://github.com/hendersa/bes BES web interface: https://github.com/hendersa/bes-config-node BES kernel device tree: https://github.com/hendersa/bes-dtb-rebuilder -
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Emutils
Search and manage batches of D64/etc files.
Emutils are a collection of utilities for dealing with files which are in formats most commonly used by Commodore 64 emulators (D64, D71, D81, etc). These include search tools, extractors, converters, archive tools, etc. especially for batch operations. -
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To give Firefox the unfortunate but desirable compatibility of (Microsoft) Internet Explorer (IE), using a (Mozilla) Firefox extension/plugin. I'm not trying to insert an IE object in a Firefox tab, no, no, no... Any support is welcome
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A simple, intuitive Javascript keyboard for Indic Languages such as Hindi, Sanskrit and Gujarati, based on Unicode characters.
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JSGB is a Nintendo GameBoy emulator. Written in JavaScript and HTML5. Integrates a debugger with breakpoints support, memory, viewer and more... You can test it here: www.codebase.es/jsgb/?v=0.02
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JSNES
A JavaScript NES emulator
JSNES is a JavaScript-based emulator that replicates the functionality of the Nintendo Entertainment System (NES), enabling classic games to run directly in web browsers or Node.js environments. It implements the core components of NES hardware, including the CPU, graphics processing unit, and audio system, to deliver an accurate emulation experience. The project is designed as a library, allowing developers to embed emulation capabilities into web applications or custom interfaces. It includes support for rendering graphics via canvas, handling audio output, and processing input from keyboards or gamepads. The architecture mirrors real hardware systems, making it both an educational tool and a practical emulator. It also supports features such as save states and cheat codes, enhancing usability. Overall, jsnes demonstrates how complex hardware systems can be recreated in software using modern web technologies. -
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PC Emulator that runs inside a JavaScript environment. Demonstration can be seen booting FreeDOS at http://pc-emulator.appspot.com (useful for running old DOS shareware games) and graphical Linux at http://linuxjsemu.appspot.com/ (rather slowly). Runs best in Chrome browser. See my other JavaScript PC emulator project at http://sourceforge.net/projects/jsdosbox (faster, also includes a dynarec and sound)
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PHPterm is a terminal/shell emulator for PHP which let's you execute shell commands just like in a shell, but all within your browser window over the HTTP protocol. It aims to provide the look and feel of konsole, the KDE terminal.
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This project aims to provide a common building block for projects such as ADEFU, SEA and VISUAL and other scada projects so that they have a common interface to the PLC\'s they communicate with. PLC\'s are Programmable Logic Controllers built to
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Serverless Offline
Emulate AWS λ and API Gateway locally
This Serverless plugin emulates AWS λ and API Gateway on your local machine to speed up your development cycles. To do so, it starts an HTTP server that handles the request's lifecycle like APIG does and invokes your handlers. Options passed on the command line override YAML options. List of available function names and their corresponding serverless.yml function keys are listed after the server starts. This is important if you use a custom naming scheme for your functions as serverless-offline will use your custom name. The left side is the function's key in your serverless.yml and the right side is the function name that is used to call the function externally such as aws-sdk. Once you run a function that boots up the Docker container, it'll look through the layers for that function, download them in order to your layers folder, and save a hash of your layers so it can be re-used in future. -
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Simple 8-bit Assembler Simulator
Simple 8-bit Assembler Simulator with Angular.js
A simulator that provides a simplified assembler syntax (based on NASM) and is simulating an x86-like CPU. Press Help inside the simulator to see an overview of the supported instructions. Make sure you have Grunt installed to compile the asmsimulator.js script. Run grunt to build the project. The simulator is written in JavaScript with Angular and runs on every device with a web browser. It has a lot of simplifications and constraints, but it is the basic structure of every emulator. The console output uses memory mapping and maps a specific portion of the memory to the console. Thus writing to the console output is as simple as writing into a specific memory location. The CPU reads instructions from the memory and executes them. The memory contains our program code and can be used by the program to store data. -
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SockJS-client
WebSocket emulation and Javascript client
SockJS is a browser JavaScript library that provides a WebSocket-like object. SockJS gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server. Under the hood SockJS tries to use native WebSockets first. If that fails it can use a variety of browser-specific transport protocols and presents them through WebSocket-like abstractions. SockJS is intended to work for all modern browsers and in environments which don't support the WebSocket protocol, for example, behind restrictive corporate proxies. SockJS-client does require a server counterpart, such as SockJS-node, which is a SockJS server for Node.js. The API should follow HTML5 Websockets API as closely as possible. All the transports must support cross domain connections out of the box. It's possible and recommended to host a SockJS server on a different server than your main web site.
