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EFSS file extension

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

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

✅ Effective File Search Script

EFSS file is an Effective File Search Script. Effective File Search (EFS) is a powerful yet easy to use search tool for Microsoft Windows.
Category: Other files
Application: Effective File Search
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
EFSS aliases:
EFSS related links:
EFSS related extensions:
Effective File Search Parameters Data

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

🚫 The .efss file extension is often given incorrectly!

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

efs, ess, fss

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

SQ-80 Sample
Kryptel Filesets File
EasySpreadsheet Document
Splitty Data Split

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

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