This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: "Dia" software – news · newspapers · books · scholar · JSTOR (December 2009) (Learn how and when to remove this template message)
Original author(s)Alexander Larsson
Developer(s)Dia developers
Initial release31 August 1998; 24 years ago (31 August 1998)[1]
Stable release
0.97.3[2] Edit this on Wikidata / 5 September 2014 (upstream), (mirror)
Written inC
Operating systemWindows, OS X, Linux, Unix
TypeDiagramming software
WebsiteGNOME Apps

Dia (/ˈdə/)[3] is free and open source general-purpose diagramming software, developed originally by Alexander Larsson.[1] It uses a controlled single document interface (SDI) similar to GIMP and Inkscape.


Dia has a modular design with several shape packages available for different needs: flowchart, network diagrams, circuit diagrams, and more. It does not restrict symbols and connectors from various categories from being placed together.

Dia has special objects to help draw entity-relationship models, Unified Modeling Language (UML) diagrams, flowcharts, network diagrams, and simple electrical circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of Scalable Vector Graphics (SVG) to draw the shape.

Dia loads and saves diagrams in a custom XML format which is, by default, gzipped to save space. It can print large diagrams spanning multiple pages[4] and can also be scripted using the Python programming language.


Dia can export diagrams to various formats, including:


This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. (February 2017) (Learn how and when to remove this template message)

Dia was originally created by Alexander Larsson, but he moved on to work on GNOME and other projects. James Henstridge took over as lead developer, but he also moved on to other projects. He was followed by Cyrille Chepelov, then Lars Ræder Clausen.

Dia is currently maintained by Hans Breuer, Steffen Macke and Sameer Sahasrabuddhe.

It is written in C, and has an extension system which also supports writing extensions in Python.

See also


  1. ^ a b Larsson, Alexander. "Initial revision". GitLab Dia Repository. Retrieved 2 August 2020.
  2. ^; publication date: 5 September 2014.
  3. ^ "Dia Frequently Asked Questions". Retrieved 2008-08-12.
  4. ^ "Dia". ohloh. Geeknet, Inc. Retrieved 2010-05-30.