Friday Night Dev

An offline FNF modding reference & toolkit for Windows.

Download v1.1.0

141.3 MB · Windows 64-bit
Released 2026-08-01 · 4 downloads

What's new in 1.1.0

Codename API: PlayState.SONG corrected to the static form (the instance form does not compile)
Codename API: getFrames no longer claims Adobe Animate support - that is loadSprite's job
Codename API: removed phantom VOLUME_* control actions and fixed the -mod startup route
New: the app now checks fndev.temp23523.com for updates on startup (toggle in Settings)

Installing

Unzip anywhere you like — your Desktop is fine. It is portable; there is no installer.
Open the FNDEV folder and run Friday Night Dev.exe.
Windows SmartScreen may warn you, because the app isn't code-signed. Click More info then Run anyway.

Verify the download (optional)

In PowerShell, run Get-FileHash .\FNDEV-1.1.0.zip — it should print:

e1563591c314cd36dcc3c9492f92c128ad40e8688e2404ed2225e9e576af8f68

The app checks this page for updates on its own. When a newer version is published it shows a notice in-app with a link back here — so you don't have to keep checking manually.