Open Source JavaScript Emulators
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JavaScript Emulators
View 2026 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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MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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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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Emupedia
The purpose of Emupedia is to serve as a nonprofit meta-resource
Emupedia is an ambitious open-source web platform and preservation initiative that aims to archive, emulate, and make accessible legacy software, games, and operating systems through a browser-based interface. Rather than focusing on a single emulator, it acts as a meta-layer that integrates multiple emulation technologies into a cohesive virtual desktop experience. The project recreates entire operating system environments, such as Windows 95 and Windows 98, within the browser, allowing users to interact with software as if they were using original hardware. Its primary goal is digital preservation, collecting and organizing abandonware, freeware, and historically significant software while making it accessible through modern web technologies. Emupedia also serves as a community hub, encouraging contributions and collaboration around retro computing and emulation projects. -
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EmulatorJS
A web-based frontend for RetroArch
EmulatorJS is a web-based frontend for RetroArch that allows users to run retro games directly in a browser without requiring local emulator installations. Built using JavaScript and WebAssembly technologies, it provides access to a wide range of console and arcade systems through a unified interface. The project functions as a library or plugin rather than a standalone application, enabling developers to embed emulation capabilities into websites or custom platforms. It offers multiple build versions, including stable, latest, and nightly, allowing users to balance reliability and cutting-edge features depending on their needs. EmulatorJS leverages CDN distribution for easy deployment and scalability, making it accessible for both personal and production environments. Its architecture supports multiple cores, each corresponding to a different system, enabling broad compatibility across retro gaming platforms. -
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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. -
Go from Code to Production URL in SecondsSkip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
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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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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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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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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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98.js
Web-based Windows 98 desktop recreation
98 is a web-based recreation of the Windows 98 operating system that runs entirely in the browser, replicating the look, feel, and behavior of the classic desktop environment. Built using JavaScript, HTML, and CSS, it recreates core components such as the desktop, taskbar, file explorer, and system applications with remarkable attention to detail. The project includes functional versions of programs like Notepad, Calculator, Minesweeper, and even a simulated Internet Explorer, providing an interactive nostalgic experience. It uses a virtual filesystem to store user data and supports drag-and-drop functionality, enabling users to interact with files similarly to a real operating system. The interface is highly polished, with support for themes, animations, and even hidden easter eggs that mimic the quirks of the original Windows 98 experience. While not a true emulator, it effectively simulates the user interface and behavior of the OS in a browser environment. -
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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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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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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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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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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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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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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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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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The first MSX Emulator 100% written in Javascript, using the new [canvas] tag to display graphics efficiently in web browsers like Firefox 2.0+.
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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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A simple, intuitive Javascript keyboard for Indic Languages such as Hindi, Sanskrit and Gujarati, based on Unicode characters.
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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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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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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
