DIA file format description

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

2 filename extension(s) found in our database.

.dia - Dia Diagram

The DIA document files are related to Dia. The DIA file is a Dia Diagram. Dia is a GTK+ based diagram creation program for Linux, Unix and Windows released under the GPL license. The native Dia file format (extension .dia) is XML compressed with GZip.

Document files
- / -
Dia Diagram related extensions:
Dia Shape File
Dia Sheet Data

.dia - Psion Organiser Diary Document

The DIA document files are related to Psion Organiser. The DIA file is a Psion Organiser Diary Document. The Psion Organiser is a sophisticated pocket computer containing digital electronic components. The Psion Organiser seems to be no longer supported.

Psion Organiser
Document files
- / -
Psion Organiser Diary Document related extensions:
FormVista Document
Minder Mind Map
Print Perfect Gold Template
Visual Mind Document
Adobe PageMaker for Mac 5 Document
InterCAD Document

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

Can't open a .dia 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 .dia file extension is often given incorrectly!

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

cia, da, dai, di, dix, diz, dja, dla, dua, eia, fia, ia, ida, ria, sia

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Nintendo 3DS CTR Importable Archive
Rollei RAW Image
Defense Department DLA Procurement Data
ARM Compiler VIA Data
Internet Data Administration Script
Mazatrol EIA Control File

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

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

DataTypes.net >> DIA file