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Genesis Plus GX vs jgenesis: catalog facts
Genesis Plus GX	jgenesis
Free The open-source emulator is available without a license fee.	Free Free to download from GitHub.
Windows, macOS, Linux	Windows, Linux, Web
One core covers Mega Drive, Sega CD, Master System, Game Gear and SG-1000 Accurate sound emulation, including the Sega CD's PCM	Several Sega consoles plus the SNES in one emulator Runs in a browser through WebAssembly
Usually run through RetroArch rather than as a standalone application	macOS is not officially supported Smaller project than the established multi-system emulators
Downloadable app	Downloadable app, Web application
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.