Compare software

jgenesis vs BlastEm: catalog facts
jgenesis	BlastEm
Free Free to download from GitHub.	Free Free and open source under the GPL.
Windows, Linux, Web	Windows, macOS, Linux
Several Sega consoles plus the SNES in one emulator Runs in a browser through WebAssembly	Cycle accuracy that handles demos other emulators fail Fast enough for old hardware despite the accuracy
macOS is not officially supported Smaller project than the established multi-system emulators	Small project with occasional releases Interface is minimal
Downloadable app, Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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