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FujiNet Go

FujiNet Go Desktop

Nintendo Entertainment System

An NES with a FujiNet plugged into the cartridge slot, ready at power-on.

FujiNet Go NES v0.4.1 Released November 3, 2026 Nintendo, 1985

Download and install Source code

Screenshots

GNOME

FujiNet CONFIG running on the emulated NES
The debugger's PPU tab: registers, nametables and sprites
Preferences: region, aspect and controllers

KDE

FujiNet CONFIG running on the emulated NES
The debugger's PPU tab: registers, nametables and sprites
Preferences: region, picture, controllers and FujiNet

Windows

FujiNet CONFIG on Windows
The debugger's PPU tab: registers, nametables and sprites
Settings: region, picture, controllers and FujiNet

Features

  • FujiNet CONFIG starts at power-on; open or import any .nes file
  • Mappers 0, 1, 2, 3, 4, 7, 11, 30, 34, 66, 71 and 206
  • Controllers window with remapping, and hot-plugged gamepads
  • Family BASIC or Subor keyboard, plus a Data Recorder that saves .fbt tapes
  • Debugger with Prompt, CPU, Disassembly, PPU, APU, Breakpoints, Cart and FujiNet tabs
  • FujiNet web UI in your browser, or switch to an external FujiNet

BIOS ROMs

Nothing to download

The NES has no BIOS. Nothing to download.

Download and install

FujiNet Go NES 0.4.1, released November 3, 2026. Release notes

Linux

Desktop
Package

Install with Flatpak (any distribution)

  1. Install Flatpak with your distribution's package manager if you don't have it yet.
  2. Add Flathub, which supplies the runtime, and the FujiNet Go repository: 
    flatpak remote-add --user --if-not-exists flathub \
    https://dl.flathub.org/repo/flathub.flatpakrepo
flatpak remote-add --user --if-not-exists fujinet-go \
    https://fujinetwifi.github.io/fujinet-go-desktop-flatpaks/fujinet-go.flatpakrepo
  3. Install the GNOME edition (or swap gnome for kde): 
    flatpak install --user fujinet-go online.fujinet.go.nes.gnome

Windows

Installer Recommended

Windows 10 or 11, 64-bit. Installs for your user only and needs no administrator rights.

Download fujinet-go-nes-0.4.1-windows-setup.exe

9.6 MB

  1. Run the downloaded file.
  2. If Windows SmartScreen says it protected your PC, choose More info, then Run anyway. The app isn't code-signed yet.
  3. Start FujiNet Go NES from the Start menu.

Portable zip

Nothing to install. Good for a USB stick or a locked-down PC.

Download fujinet-go-nes-0.4.1-windows.zip

12.7 MB

  1. Right-click the zip, choose Extract All…, and pick a folder.
  2. Open the folder and run the .exe inside.

macOS

macOS app

macOS 13.3 or later. For Macs with Apple silicon (M1 and later).

Apple silicon fujinet-go-nes-0.4.1-macos-arm64.zip · 8.5 MB
  1. Open the downloaded zip and drag FujiNet Go NES into Applications.
  2. The first time, Control-click the app and choose Open, then Open again. (On macOS 15 and later: try to open it, then go to System Settings ▸ Privacy & Security and choose Open Anyway.)
  3. Or clear the download quarantine in Terminal: 
    xattr -dr com.apple.quarantine "/Applications/FujiNet Go NES.app"
Every file in this release, with SHA-256 checksums
FileForSizeSHA-256
online.fujinet.go.nes.gnome.flatpak Linux · GNOME · Flatpak bundle 7.7 MB 1060aa2581783d9a61b04f9373e222d5021cdf4f6fd8fe7230961c8f7c9014a3
online.fujinet.go.nes.kde.flatpak Linux · KDE · Flatpak bundle 7.5 MB ad59a67615dc25e039052182c5b896d5de39d482a2f3a46f11d70d46a4f6453e
fujinet-go-nes-gnome-0.4.1-Linux.deb Linux · GNOME · .deb 9.2 MB 1d47de0b438c0cd5e064b8713dfde7063a08cee55e83d3921fb6c9ff2bad9f42
fujinet-go-nes-kde-0.4.1-Linux.deb Linux · KDE · .deb 9.3 MB d8c477971c5590299d6aec0600140cbcb07dd76b84bb70bbaa27e10e4cf96e8f
fujinet-go-nes-gnome-0.4.1-Linux.rpm Linux · GNOME · .rpm 7.3 MB 1de0a8727d8f90dad49ae2d44eee724374e6a0a72a43723adf1b887a09cc31d6
fujinet-go-nes-kde-0.4.1-Linux.rpm Linux · KDE · .rpm 7.4 MB 39b08681a960e964daa0e6176525214acd45885addbcebe4d6e4425b5ef4290e
fujinet-go-nes-gnome-0.4.1-Linux.tar.gz Linux · GNOME · .tar.gz 9.2 MB e7614d9c7787b93536d4bc630b151ae22c8eb7d21e2ba105fd432982f0c64710
fujinet-go-nes-kde-0.4.1-Linux.tar.gz Linux · KDE · .tar.gz 9.3 MB e51562cca86e45f96791d4589d1057cf869f5f69757f20864bd048f4f0cfc384
fujinet-go-nes-0.4.1-windows-setup.exe Windows installer 9.6 MB 27140aeff39a0d047e612b60fb687d259784a60880a4eafd2366f358e670a1da
fujinet-go-nes-0.4.1-windows.zip Windows portable zip 12.7 MB 7b083cda731f413ec52e2903228c7dd13b24aa764b5b1382a4134750c8c85bad
fujinet-go-nes-0.4.1-macos-arm64.zip macOS · Apple silicon 8.5 MB 9b2ff5e2bf8f09dd1f5b9275f3914b6afa83317653ac62a55d2c5f49a28d6f85

Built on

FujiNet Go NES is free software (GPL-3.0). It stands on these projects:

  • MesenCE GPL-3.0-or-later

    Emulator core, a continuation of Mesen 2 (github.com/SourMesen/Mesen2). Sour and the Mesen contributors

  • Lua and luasocket MIT

    Scripting, through MesenCE. PUC-Rio; Diego Nehab

  • 7-Zip SDK Public domain

    Archive support, through MesenCE. Igor Pavlov

  • fujinet-firmware GPL-3.0-or-later

    The FujiNet itself, built into every app. Thomas Cherryhomes and the FujiNet contributors

  • Mbed TLS Apache-2.0

    TLS for FujiNet's network protocols. The Mbed TLS contributors

  • libssh, libsmb2, libnfs LGPL-2.1-or-later

    FujiNet's SSH, SMB and NFS protocols. Their respective authors

  • cJSON, expat MIT

    JSON and XML parsing in FujiNet. Dave Gamble; the Expat maintainers

  • SDL 3 Zlib

    Video, audio and gamepads. Sam Lantinga and the SDL contributors

  • GTK 4 and libadwaita LGPL-2.1-or-later

    The GNOME edition's interface. The GNOME project

  • Qt 6 LGPL-3.0-only

    The KDE edition's interface. The Qt Company and contributors

The full list of bundled code, versions and licences is in COMPLIANCE.md. Source code · All releases · Report a problem