A daily updated filename extension database!

DET file extension

The table below provides useful information about the .det file extension. It answers questions such as:

  • What is the .det file?
  • What program do I need to open a .det file?
  • How can the .det file be opened, edited or printed?
  • How can I convert .det files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Act! Email Message

DET file is an Act! Email Message. ACT! by Sage is a customer relationship management (CRM) software application which is used to keep track of client and prospect details in a single database that can be shared by multiple users.
DET format description not yet available
Category: Data files
Application: ACT!
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
DET aliases:
DET related links:
DET related extensions:
Act! Blob Data

Act! Database File

Act! Database Log

Act! Report Data

Act! Word Processor Document

Act! Template

Act! Notes Database

Act! Design Layout File

Act! Data File

Act! Database Index

Other types of files may also use the .det file extension.

🚫 The .det file extension is often given incorrectly!

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

cet, ddt, de, def, der, dft, drt, dst, dt, dte, dwt, edt, eet, et, fet

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Football Manager Data
Oracle Documaker GenData Dataprocessing Rules Data
Hitachi COBOL2002 Data
Dreamweaver Web Template File
PSpice Custom Derating
WinSQL Export Template
SmartWare Definition Data
SAP Business Objects Report Template
Autodesk AutoCAD Template
Tajima Embroidery Data

🔴 Can't open a .det 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .det file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .det file extension, write to us!

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