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ERFX file extension

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

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

✅ Efficient Reminder v3 Data

ERFX file is an Efficient Reminder v3 Data. Efficient Reminder is a professional, cross-platform and easy-to-use software program which designed for managing date, meeting, events.
ERFX format description not yet available
Category: Data files
Application: Efficient Reminder
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
ERFX aliases:
ERFX related links:
ERFX related extensions:
Efficient Address Book v5 Data

Efficient Address Book v3 Data

Efficient Address Book v2 Data

Efficient Reminder v2 Data

Efficient Reminder v5 Data

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

🚫 The .erfx file extension is often given incorrectly!

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

rfx, edfx, refx, erf, effx, erx, efx

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

RealFlight Archive
RoboForm Blocking Passcards File
Efficient Diary v3 Document
CA ERwin Diagram
Efficient PIM v3 Data
eFax Document
Bioware Encapsulated Resource File
Epson RAW Image
Efficient Reminder v2 Data

🔴 Can't open a .erfx 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 .erfx 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 .erfx file extension, write to us!

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