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

Details of extension .efm

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

Below, you can find answers to the following questions:

  • What is the .efm file?
  • Which program can create the .efm file?
  • Where can you find a description of the .efm format?
  • What can convert .efm files to a different format?
  • Which MIME-type is associated with the .efm extension?
Electronic Fiction Manuscript .efm file icon

Electronic Fiction Manuscript

EFM file is an Electronic Fiction Manuscript. EFM aims to be a better alternative to RTF for writing and editing fiction. It is a plain text based format, which means there are many, many tools that can edit it - even Notepad will handle it, if you make sure to pick UTF-8 when you save it.
Category: Document files
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:

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

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Delphi Form
Kashmir 3D EVM Map Data
Enigmo Solutions File
PCEM Electromask Data
Novadigm EDM data
Adobe FrameMaker Document
Help and Manual eBook Template
Sybase PowerDesigner Free Model
Adobe Encore Menu Template

The .efm filename extension is often given incorrectly!

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

sfm (1), dfm (1), fm (1), fem (1), erm (1), em (1), efl (1), ef (1), edm (1), wfm (1), ebm (1), rfm (1), ffm (1), evm (1), emf (1)

Can't open a .efm file?

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

Windows can't open this file:

File: example.efm

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

Rate this page

5 / 5 based on 28 user ratings.