This article explains what an EMZ file is, how to open an EMZ file directly or extract its EMF image, and which programs can convert an EMZ file to an image format such as JPG, GIF, or PNG.
How to Open .emz Files in Windows 10 – Can't Open emz Files (Easy Method)
A file with the EMZ file extension is a compressed image file, more specifically referred to as a Windows Compressed Enhanced Metafile file.
These types of files are actually just GZIP-compressed EMF files. This is a graphics format used by Microsoft applications such as Visio, Word, and PowerPoint.
The free program XnView MP allows you to view EMZ files on Windows, Mac and Linux.