EmulatorJS vs OpenEmu

EmulatorJS8.5Visit OpenEmu8.0Visit

Higher score EmulatorJS #5 in Multi-System Emulators 8.5/10 Open source ✓ 3 of 5 features Visit EmulatorJS

vs

OpenEmu #8 in Multi-System Emulators 8.0/10 Free plan Free plan✓ 3 of 5 features Visit OpenEmu

• EmulatorJS fits best

  Websites needing broad browser emulation

• OpenEmu fits best

  Mac users wanting a polished game library

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Side by side

Feature	EmulatorJS 8.5/10 Visit ↗	OpenEmu 8.0/10 Visit ↗
At a glance
Editor score	8.5	8.0
Ranking	#5 in Multi-System Emulators	#8 in Multi-System Emulators
Best for	Websites needing broad browser emulation	Mac users wanting a polished game library
Pricing model	Free	Free
Starting price	Open source	Free plan
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Self-hosted	Desktop
Platforms	Web, iOS, Android	macOS
Support	Community, Docs	Community, Docs
Built for	Small business, Mid-market, Enterprise	Solo, Small business
Features EmulatorJS 3/5 · OpenEmu 3/5
Android support	✓ (best)	—
Arcade support	✓	✓
Netplay	—	—
BIOS required	Not checked yet	✓ (best)
Shader/upscaling	✓	✓
Specs
Supported systems	36 (best)	31
License	Open-source	Open-source
Our review
Pros	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.	Supports 31 systems through a modular emulator-core architecture Unified library with automatic organization and box-art handling USB and Bluetooth controllers, save states, rewinding, and shaders
Cons	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.	Available only on macOS BIOS files are required for some systems or cores No netplay; Arcade support is experimental and unsupported
Our verdict	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 →	OpenEmu is a free, open-source macOS application for emulating games from multiple classic console and handheld systems. It is aimed at Mac users who want one organized library for importing and managing ROM backups instead of separate… Read the review →

Strengths and trade-offs

• 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.

• OpenEmu — where it wins

  • Supports 31 systems through a modular emulator-core architecture
  • Unified library with automatic organization and box-art handling
  • USB and Bluetooth controllers, save states, rewinding, and shaders

  Where it doesn't

  • Available only on macOS
  • BIOS files are required for some systems or cores
  • No netplay; Arcade support is experimental and unsupported

• EmulatorJS8.5/10 · Open source

  A broad, open-source browser emulator for embedded retro-system play, without current netplay.

  Visit EmulatorJSFull verdict →
• OpenEmu8.0/10 · Free plan

  A free, organized emulator library for Mac users who want broad classic-system support.

  Visit OpenEmuFull verdict →