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Head-to-head · Multi-System Emulators

RetroArch vs EmulatorJS

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score RetroArch #1 in Multi-System Emulators 9.4/10 Free plan Free plan✓ 4 of 5 features Visit RetroArch
EmulatorJS #5 in Multi-System Emulators 8.5/10 Open source ✓ 3 of 5 features Visit EmulatorJS

RetroArch leads on 1 check, EmulatorJS on 0, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreRetroArch · 9.4/10
  • Free planonly RetroArch
  • Most featuresRetroArch · 4 of 5

RetroArch scores higher on our rubric for multi-system emulators: 9.4 against 8.5 out of 10; our editors rank them #1 and #5.

RetroArch offers netplay; EmulatorJS doesn't.

RetroArch is the better fit for most users wanting a broad emulator hub. EmulatorJS is the better fit for websites needing broad browser emulation.

  • RetroArch fits best

    Most users wanting a broad emulator hub

  • EmulatorJS fits best

    Websites needing broad browser emulation

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Side by side

Feature RetroArch 9.4/10 Visit ↗ EmulatorJS 8.5/10 Visit ↗
At a glance
Editor score 9.4 8.5
Ranking #1 in Multi-System Emulators #5 in Multi-System Emulators
Best for Most users wanting a broad emulator hub Websites needing broad browser emulation
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud, Desktop, Mobile Self-hosted
Platforms Web, Windows, macOS, Linux, iOS, Android Web, iOS, Android
Support Community, Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features RetroArch 4/5 · EmulatorJS 3/5
Android support ✓ ✓
Arcade support ✓ ✓
Netplay ✓ (best) —
BIOS required Not checked yet Not checked yet
Shader/upscaling ✓ ✓
Specs
Supported systems Not checked yet 36
License Open-source Open-source
Our review
Pros
  • Unified interface for launching, configuring, and organizing cores
  • Downloadable cores, playlists, shaders, netplay, recording, and rewind
  • Free and open source across web, desktop, iOS, and Android
  • Embeddable WebAssembly RetroArch cores cover 36 systems.
  • Includes save states, recording, cheats, shaders, and cache management.
  • Maps keyboards and controllers for up to four players.
Cons
  • Core and feature availability varies by platform and distribution
  • BIOS requirements vary by core and content
  • Does not distribute copyrighted BIOS files
  • Netplay is not currently supported.
  • Its scope centers on web embedding, not standalone ROM management.
  • The JavaScript and WebAssembly approach suits web projects more than native apps.
Our verdict

RetroArch is an open-source frontend for the libretro API, bringing emulator, game-engine, and media-player cores into one interface. It is designed for people who want a broad emulator hub rather than separate applications for each…

Read the review →

EmulatorJS is an open-source JavaScript framework for developers who want to embed playable retro-system emulation into websites. It uses RetroArch libretro cores compiled to WebAssembly and provides generated embed code for browser-based…

Read the review →
  1. RetroArchMulti-System Emulators 9.4Free plan
  2. EmulatorJSMulti-System Emulators 8.5Open source

Strengths and trade-offs

  • RetroArch — where it wins

    • Unified interface for launching, configuring, and organizing cores
    • Downloadable cores, playlists, shaders, netplay, recording, and rewind
    • Free and open source across web, desktop, iOS, and Android

    Where it doesn't

    • Core and feature availability varies by platform and distribution
    • BIOS requirements vary by core and content
    • Does not distribute copyrighted BIOS files

  • EmulatorJS — where it wins

    • Embeddable WebAssembly RetroArch cores cover 36 systems.
    • Includes save states, recording, cheats, shaders, and cache management.
    • Maps keyboards and controllers for up to four players.

    Where it doesn't

    • Netplay is not currently supported.
    • Its scope centers on web embedding, not standalone ROM management.
    • The JavaScript and WebAssembly approach suits web projects more than native apps.

More comparisons

All Multi-System emulators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update