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FCEUX vs MAME: catalog facts
FCEUX	MAME
Free Free and open source under the GPL.	Free Free and open source under the GPL 2.0. No ROMs are included.
Windows, macOS, Linux	Windows, macOS, Linux
Lua scripting and frame-precise movie recording for tool-assisted runs Debugger, hex editor and PPU viewers built in	Covers thousands of arcade, console and computer systems in one program Accuracy is the stated priority, so behaviour matches the original hardware
Interface is dated and dense with developer tools NES and Famicom only	Accurate emulation of later hardware needs a genuinely fast machine ROM sets must match the exact version MAME expects, which frustrates newcomers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0
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 September 21, 2026

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