100+ Emulators Written in JavaScript

A list of emulators written in the JavaScript programming language.

If you know about any emulators not on this list, please let me know in the comments section.

And be sure to check out our other comprehensive JavaScript lists of free javascript books and JavaScript data visualization libraries.



  • CPCBox – Amstrad CPC emulator in JavaScript
  • Roland – An Amstrad CPC emulator written in JavaScript






Robotron / VEB Mikroelektronik

  • KC85_Emu – KC85/3 and KC85/4 emulator by Alexander Lang
  • YAKC – Yet Another KC emulator by A.Weissflog (KC85/2..4, KC87, Z9001, Z1013)


  • jsSMS – JavaScript Sega Master System & Game Gear emulator (Source)
  • Miracle – Sega Master System emulator (Source)



Multi-system Emulators

  • JSMESS examples – The JavaScript MESS (Multi Emulator Super System) (Source) (Notes)
  • PCE – PC emulators in JavaScript (Atari ST, IBM PC 5150, Macintosh, RC759 Piccoline)
  • RetroArch – JavaScript port of RetroArch (bundles Gambatte (Gameboy), Genesis Plus GX, Handy (Lynx), Snes9x Next, VBA Next (GameBoy Advance), Tyrquake and FinalBurn Alpha)
  • RetroWeb – collection of Javascript emulators and boot media, including Apple-IIe (VisiCalc), Macintosh (System 1.0), Atari 1040ST, Commodore 64, Amiga 500 (Workbench 1.3), IBM PC Model 5150 (PC-DOS, CP/M-86, Cassette Basic), IBM PC XT (DOS, GEM 1.2, VisiCalc, Windows 1.01, 8088 Corruption demo), RC759 Piccoline (Eliza, Bil-simulation, Concurrent CP/M-86), TRS-80.

PC Emulators

  • JS/Linux – JavaScript PC emulator
  • JsDOSBox – JavaScript PC DOS emulator (Source)
  • PCjs – IBM PC Model 5150 emulator
  • Virtual x86 – An x86 emulator written in JavaScript (Source)
  • jemul8 – An object-oriented JavaScript x86 emulator for Node.js and the Browser (Source)
  • jsbochs – Bochs PC emulator for the Browser (Source)

Bare CPUs

Early machines

Calculator emulators

Microcode-level calculators

Workalike calculators

  • HP-11C, HP-12C Platinum, HP-16C – by Elvis Pfützenreuter
  • HP-15C – by Greg Hewgill. (Source)
  • HP-21 and HP-29 by Greg Sydney-Smith (See here and here)
  • HP-25 – by John Clenance
  • HP-35 – JavaScript emulator by Neil Fraser
  • HP-35 SOS – modified HP-35 with stack overflow sensing LED, by Hans Klaver, based on Fraser’s work
  • HP-48 – JavaScript implementation of the most commonly used HP-48 functions. More info here, by Josh Poley


Adventure Game Engines

  • Emscripten ScummVM – Emscripten fork of the ScummVM engine (Source)
  • IFVMS – Infocom/Inform Web interpreter
  • Parchment – Infocom/Inform Web interpreter
  • ZZTJS – ZZT game engine in JavaScript
  • ngPAWS – Professional Adventure Writer (PAW) Web interpreter


  1. maxton August 25, 2016
  2. Jordi Baylina August 21, 2016
  3. Imran Nazar August 15, 2016

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