DIFF file format description

Many people share .diff files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .diff file can be edited, converted or printed with. On this page, we try to provide assistance for handling .diff files.

1 filename extension(s) found in our database.

.diff - Diff Output

The DIFF other files are related to GNU Diff. The DIFF file is a Diff Output. Diff is a file comparison utility that outputs the differences between two files on Unix systems.

GNU Diff
Other files
- / -
Diff Output related extensions:
Sony Playstation 3 Update Package
iAd Producer Plugin
Lightwave 3D Plugin
QuestX Script
VAKCER Project Tracker COM Add-in

Naturally, other applications may also use the .diff file extension. Even harmful programs can create .diff files. Be especially cautious with .diff files coming from an unknown source!

Can't open a .diff file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .diff file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ciff, dff, dif, fiff, iff, riff, siff, viff, wiff

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Scene Interchange File Format Data
Elekta Neuromag FIFF Data
GTA III Model Data
Khoros Visualization Image
AB SCIEX Windows Interchange File Format Data
EA Interchange File Format

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.


If you have useful information about the .diff file format, then write to us!

DataTypes.net >> DIFF file