File Extension Library

.EFTX File Extension

  • Developer by: Microsoft
  • Category: Settings Files
  • Format: Zip

What are .EFTX files and how to open them?

Can't open .EFTX file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .EFTX file.

What is a .EFTX file extension?

.EFTX file extension is created by Microsoft. .EFTX has been classified as Settings Files. The format of .EFTX file is Zip.

.EFTX is Office 2007 Theme Effect File

Theme effect that can be applied to presentations and documents in Microsoft Office 2007 or later; contains effects that may be applied to charts, SmartArt graphics, tables, pictures, shapes, WordArt, and text; includes effects for lines, fills, and special effects, such as 3D and shadow effects.

EFTX files contain a subset of the data stored in .THMX files. To create an EFTX file from a THMX file, remove the slideMasters, slideLayouts, and _rels folders from the theme top-level folder in a THMX zip package, and then rename the file with a ".eftx" file extension.

EFTX files are commonly used across multiple Microsoft Office documents and presentations to maintain the same look and feel. They are not available in Office 2008 for Mac.

List of all softwares that can open the Office 2007 Theme Effect File
Microsoft Word 2016
Microsoft Excel 2016
Microsoft PowerPoint 2016

How to fix problems with .EFTX files

  1. You need to update the application that you normally use to open .EFTX files. Only the latest version of the software supports the current .EFTX file format
  2. You need to check the .EFTX file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)