OTM file format description

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

2 filename extension(s) found in our database.

.otm - Microsoft Outlook VBA Project

The OTM project files are related to Microsoft Office Outlook. The OTM file is a Microsoft Outlook VBA Project. Developers have wanted to use Microsoft Visual Basic for Applications (VBA) in Microsoft Outlook since Outlook was first released. Outlook supports both the VBA language and the Visual Basic Editor found in all other Office applications.

Microsoft Office Outlook
Project files
- / -
Microsoft Outlook VBA Project related extensions:
Microsoft Visual J++ 6.0 Project
Microsoft Visual Studio ASP.NET vNext Project
Microsoft Application Virtualization Sequencer Project
Microsoft Visual Studio Text Macro Project
Microsoft Visual Studio Project
Microsoft Visual Studio LightSwitch Project

.otm - Origin Matrix Book Template

The OTM document files are related to Origin. The OTM file is an Origin Matrix Book Template. Origin is a software application with tools for data analysis, publication-quality graphing, and programming.

Document files
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Origin Matrix Book Template related extensions:
Origin C Source Code
Origin Configuration File
Origin Sample Curve Data
Origin Fitting Function Definition File
Origin Code Builder Object
Origin Encrypted C Source Code

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

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

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

itm, ktm, ltm, ofm, ogm, om, omt, orm, ot, oth, otl, otn, ptm, tm, tom

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

LiteMail Database
Microsoft PowerToys Explorer Tool Data
Tom Source Code
Infinity Engine Item Data
Ormetis Workbench Data
Tecmail Configuration

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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DataTypes.net >> OTM file