DDT File Extension

The DDT file extension was created by Michael Vinther and is also known as the Diagram Designer Template. DDT is classified as a Data Files and This file is saved in a binary format, which requires a specific program to read its contents. You can open DDT files in Microsoft Notepad program.

Diagram Designer Template File Type

Diagram Designer Template File Type
Extension .ddt
Developer Michael Vinther
Popularity 5.0 (1 Votes)
Mime Type mime-type/not.available
Default Program Microsoft Notepad
Category Data Files
Format Binary
Updated 6/1/2025

What is a DDT File Type?

DDT files are used to store technical documentation for object-oriented program code, business processes and other conceptual drawings.

Free Online DDT Tools & Apps

Access powerful and secure free online DDT tools to convert, view, edit, merge, split, and compare DDT files — all without installing any software. Our tools support the .DDT (Diagram Designer Template) file extension and run smoothly in any modern browser.

Select a tool below to explore features and manage your DDT files directly from your device with ease.

DDT Files Common Issues

There are few common issues with the Diagram Designer Template .DDT=9265 File Extensions while opening the .DDT=9265 files on Windows and MacOs, we have solution to those issues such as:

Can't Open DDT Files?

  1. You must have supported software programs installed for Diagram Designer Template on your system such as Microsoft Notepad.
  2. Associate default Microsoft Microsoft Notepad program for *.ddt (Diagram Designer Template) files.


All Platform Software Programs for DDT File Extension

List of all softwares that can open the DDT files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Microsoft Windows logo image Open DDT File on Windows

Software License Developer
Microsoft Notepad image. Microsoft Notepad 1903 for Windows Bundled Microsoft
Notepad++ image. Notepad++ 6 for Windows Freeware Notepad Plus Plus

MacOs logo image - FileProInfo.comOpen DDT File on Mac OS

Software License Developer

Linux logo image - FileProInfo.comOpen DDT file on Linux

Software License Developer

Website logo image - FileProInfo.comOpen DDT file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen DDT file on iOS

Software License Developer

Android logo image - FileProInfo.comOpen DDT file on Android

Software License Developer

About Licensing

  1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
  2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
  3. Free+ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
  4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
  5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

DDT file extension icon image.About DDT - Diagram Designer Template

FileProInfo is to help you understand about the Diagram Designer Template with *.DDT suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for DDT. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

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Updated 6/1/2025