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.EFTX File Extension

A .EFTX file is a Office 2007 Theme Effect File, created by Microsoft.

Open with Microsoft Word 365. Available for Windows.

What is a .EFTX file?

The .EFTX file extension stands for an Office 2007 Theme Effect File. This type of file is used with Microsoft Office 2007 and newer versions. It contains special design elements that can be added to different parts of your documents and presentations. For example, you can use it to add special effects to charts, SmartArt graphics, tables, pictures, shapes, WordArt, and even the text in your document. These effects include things like different types of lines, fill colors, and even cool effects such as making objects look 3D or adding shadows to them.

You can open and use .EFTX files with several programs, including Microsoft Word 365, Microsoft Excel 365, and Microsoft PowerPoint 365. These are all part of the Microsoft Office suite, which is a collection of programs used for creating documents, spreadsheets, and presentations.

If you're interested in creating your own .EFTX file, it's actually a part of what's called a .THMX file, which is a bigger file that includes more than just the theme effects. To make an .EFTX file, you would start with a .THMX file and then remove certain parts of it, like the slideMasters, slideLayouts, and _rels folders. After removing these, you rename what's left with a ".eftx" at the end, and then you have your theme effect file.

These .EFTX files are really useful because they let you make sure that all your Microsoft Office documents and presentations have a consistent style. This means that all your work can have the same look, which is great for projects, work presentations, or any time you want things to look professional and cohesive. However, it's important to note that these files are not supported in Office 2008 for Mac, so if you're using that version, you won't be able to use .EFTX files.

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