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MAME vs Javatari: catalog facts
MAME	Javatari
Free Free and open source under the GPL 2.0. No ROMs are included.	Free Free to use in the browser.
Windows, macOS, Linux	Web
Covers thousands of arcade, console and computer systems in one program Accuracy is the stated priority, so behaviour matches the original hardware	Runs in a browser with no install Supports many 2600 cartridge formats
Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers	Covers only the Atari 2600 Copyright notice dates from 2015, so updates may be infrequent
Downloadable app	Web application
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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