Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .effx

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

Below, you can find answers to the following questions:

  • What is the .effx file?
  • Which program can create the .effx file?
  • Where can you find a description of the .effx format?
  • What can convert .effx files to a different format?
  • Which MIME-type is associated with the .effx extension?
Efficient PIM v3 Data .effx file icon

Efficient PIM v3 Data

EFFX file is an Efficient PIM v3 Data. EfficientPIM is a full-featured and cross-platform personal information manager that can help you manage your life.
Detailed description not available
Category: Document files
Application: Efficient PIM
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Efficient PIM v1 Data
Efficient PIM v2 Data
Efficient PIM v5 Data

Other types of files may also use the .effx file extension. If you have helpful information about .effx extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Efficient Calendar v3 Document
Estimator.NET Estimate
EVS Field Data
Microsoft Office 2007 Theme
eFax Document
Efficient Reminder v3 Data
Microsoft Find Fast Index

The .effx filename extension is often given incorrectly!

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

erfx (1), eftx (1), edfx (1), ffx (1), efx (1), eff (1), ecfx (1)

Can't open a .effx file?

If you want to open a .effx file on your computer, you just need to have the appropriate program installed. If the .effx association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.effx

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 from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android