ECF File - opening and understanding

Did your computer fail to open an ECF file? We explain what they are used for and recommend software that we know can open or otherwise handle your .ECF files.

What is an ECF file?

Files that contain the .ecf file extension are most commonly associated with the Microsoft Outlook email and calendar software application.

The ECF files that are used with the Microsoft Outlook software contain add-ins that allow users to install extra features into the Outlook application. The add-in files can be managed using the Add-In Manager that is found in the "Advanced Options feature in the Outlook program.

The Microsoft Exchange Server also uses the .ecf file suffix. These ECF files contain exchange extended configuration files, which are the configuration files that are used to configure the Microsoft Exchange software program.

How to open ECF files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension ECF for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different ECF openers which you will find listed below.

Suggest another file format using extension ECF

While we know of one file format using the .ECF file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .ECF file.

Various viewers for this file format

These apps are known to open certain types of ECF files. Remember, different programs may use ECF files for different purposes, so you may need to try out a few of them to be able to open your specific file.

EmbirdEmbirdUser submitted
Easy CommunicatorEasy CommunicatorUser submitted
uniPaaSuniPaaSUser submitted
ThermaCAM Text File EditorThermaCAM Text File EditorUser submitted
Quick3270Quick3270User submitted
Efficient Calendar FreeEfficient Calendar FreeUser submitted
iGrafxiGrafxUser submitted
EMTPWorksEMTPWorksUser submitted
eDevelopereDeveloperUser submitted
We have not verified any software that we know for certain will work with ECF-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with ECF-files. If you know one, please use the 'Suggest a program' link below and tell us about it!