Compare software

BlastEm vs jgenesis: catalog facts
BlastEm	jgenesis
Free Free and open source under the GPL.	Free Free to download from GitHub.
Windows, macOS, Linux	Windows, Linux, Web
Cycle accuracy that handles demos other emulators fail Fast enough for old hardware despite the accuracy	Several Sega consoles plus the SNES in one emulator Runs in a browser through WebAssembly
Small project with occasional releases Interface is minimal	macOS is not officially supported Smaller project than the established multi-system emulators
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: GPL-3.0	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.