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SPECIFICTION
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FCEUX

fceux.com

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Spec score 8.1 #4 of 26 in NES Emulators

What it is

FCEUX is a free, open-source emulator for NES, Famicom, Famicom Disk System, and Dendy systems. It supports NTSC, PAL, and NTSC-PAL Hybrid video modes and offers tools for casual play as well as advanced work such as debugging, ROM hacking, map making, tool-assisted movies, and Lua scripting. The project maintains Win32 and Qt/SDL ports. The Qt/SDL version runs across Windows and UNIX-like systems, including Linux, Solaris, BSD, and OSX. Its tools include debug utilities, movie recording, a TAS Editor, sprite viewer, NES Palette Editor, AVI RIFF Tree viewer, and frame timing tool. Network play in both Win32 and SDL ports is not functional, and the project says it has no plans to fix it. Building Qt/SDL requires Qt5, SDL2, minizip, zlib, and OpenGL; CMake is needed to build from source. FFmpeg libraries are optional for AVI recording, and libx264 is optional for H.264 AVI encoding. The project dates to 2006, and its home page lists version 2.6.6, released on 26 August 2023, as the latest release.

Spec sheet

Purpose
FCEUX emulates NES, Famicom, Famicom Disk System and Dendy systems.Read 7 Oct 2026 · fceux.com
Support
The project directs users with unresolved questions to TASVideos forums and bug reports or feature requests to GitHub Issues.Read 7 Oct 2026 · fceux.com
Founded
2006Read 28 Sep 2026 · fceux.com
Advanced tools
FCEUX offers tools for debugging, ROM hacking, map making, tool-assisted movies and Lua scripting.Read 7 Oct 2026 · fceux.com
Affiliation
The site states that FCEUX is not affiliated with or endorsed by Nintendo or Nintendo of America.Read 7 Oct 2026 · fceux.com
Build requirements
Building the Qt/SDL port requires Qt5, SDL2, minizip, zlib and OpenGL; CMake is required to build from source.Read 7 Oct 2026 · fceux.com
Community contact
The project lists an IRC channel, #fceu on irc.libera.chat, as the best way to contact someone.Read 7 Oct 2026 · fceux.com
Emulation
The project describes FCEUX as an all-in-one emulator offering accurate emulation for casual play and advanced uses.Read 7 Oct 2026 · fceux.com
Latest listed release
The home page lists FCEUX 2.6.6, released on 26 August 2023, as the latest release.Read 7 Oct 2026 · fceux.com
Network play
Network play in both Win32 and SDL ports is not presently functional, and the site says there are no plans to fix it.Read 7 Oct 2026 · fceux.com
Optional video dependencies
FFmpeg libraries are optional dependencies for AVI recording features, and libx264 is optional for H.264 AVI encoding.Read 7 Oct 2026 · fceux.com
Ports
The team maintains Qt/SDL and Win32 ports; the Qt/SDL port is described as cross-platform for Windows and UNIX-like systems including Linux, Solaris, BSD and OSX.Read 7 Oct 2026 · fceux.com
Qt/SDL features
The Qt/SDL port includes debug tools, Lua scripting, movie recording and TAS Editor, plus a sprite viewer, NES Palette Editor, AVI RIFF Tree viewer and frame timing tool.Read 7 Oct 2026 · fceux.com
Video modes
It supports NTSC, PAL and NTSC-PAL Hybrid modes.Read 7 Oct 2026 · fceux.com

Plans and prices

FCEUX Free NES, Famicom, Famicom Disk System and Dendy emulation · Win32 and Qt/SDL ports Read 7 Oct 2026 · fceux.com

Every FCEUX plan and price →

Strong points and limits

Strong points

  • Free and open-source
  • Supports NTSC, PAL, and hybrid video modes
  • Includes Lua scripting and debugging tools
  • Qt/SDL port runs on Windows and UNIX-like systems

Limits

  • Network play is not functional
  • Project says it has no plans to fix network play
  • Building Qt/SDL requires several dependencies

Who it suits

FCEUX suits people who want to emulate the listed Nintendo and Dendy systems, as well as users working with debugging, ROM hacking, or tool-assisted movies. Its Qt/SDL port includes several additional editing and recording tools.

Verdict

FCEUX combines emulation with a broad set of tools for editing and analysis. Network play is unavailable, so it is not a fit for users who need that feature.

Where Specifiction places it

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