EmulatorJS vs RetroHub

EmulatorJS is a free, open-source frontend for RetroArch that lets a site owner embed an emulator in a web page. The project provides a code generator, and says the resulting embed can be added with a few lines of code. EmulatorJS uses RetroArch’s libretro cores to run games. Its supported systems documentation includes NES, Nintendo 64, PlayStation, PSP, Sega systems, and Commodore systems, though the project warns that this list may be out of date. Built-in options allow customization, and multiple languages are supported. The project describes EmulatorJS as a library or plugin rather than a standalone website, and it does not provide a Docker container. A public CDN offers paths labeled stable, latest, and nightly. The listed platforms are web, Android, iOS, and self-hosted. Pages must be served through a web server; opening an HTML file directly is unsupported. Threaded cores may improve performance, but need SharedArrayBuffer enabled through COOP and COEP response headers. The 4.3.0-pre release is marked as a prerelease and is discouraged for production use where stability is needed.

RetroHub is a free frontend for organizing, displaying, and launching a retro-game library on Windows, macOS, and Linux. A first-time setup wizard helps configure it, and users can import games and settings from supported frontends. The app supports more than 80 systems and more than 50 emulators, while allowing users to add settings for others; it does not include emulators. Game metadata and media can be customized, and the built-in ScreenScraper feature can identify games by file hash or filename and fetch related information and images. ScreenScraper applies hourly and daily API quotas, and scraped media for a large library may take more than 1 GB of disk space. Users can change themes, and theme development can shape the interface and add features. Inputs include keyboard, mouse, controller, and touch; keyboard and controller actions can be remapped. The interface adapts to screen size and aspect ratio and includes a screen-reader option. RetroAchievements is an optional integration. Source code is MIT-licensed, while official builds use GPLv3 due to bundled third-party libraries.