An EMZ file is a compressed image file that Windows uses to store clipboard graphics

An EMZ file is a Microsoft Windows format for storing pictures that you've copied to your clipboard. The name stands for "Enhanced Metafile Zipped" — it's a metafile (a type of vector graphic that stores drawing instructions rather than individual pixels) that's been compressed with zipping technology. When you copy a chart, diagram, or screenshot in Windows and paste it into another program, Windows often saves a backup copy as an EMZ file in a temporary folder.

You'll typically find EMZ files in hidden system folders like C:\Users\[YourUsername]\AppData\Local\Temp rather than in your regular Documents or Downloads. They're not files you create intentionally — Windows generates them automatically as part of its clipboard management. Most people never see them because they're hidden by default and get cleaned up over time.

Key Takeaways

  • EMZ files are compressed graphics that Windows creates automatically when you copy images or charts to your clipboard.
  • You'll find them in hidden temporary folders, not in your regular file directories.
  • They're safe to delete because Windows creates new ones as needed and they don't affect your programs or documents.
  • You can open an EMZ file with image editing software like Paint or Photoshop if you need to view what's inside.
  • EMZ files take up minimal disk space and are part of normal Windows operation.

Where EMZ files come from and why Windows creates them

Windows creates an EMZ file each time you copy a graphic — a chart from Excel, a screenshot, a diagram from Visio, or an image from a web page — and hold it in your clipboard. The file acts as a backup copy of that graphic. If you paste the image into Word, Outlook, or another program, Windows has already stored the original in EMZ format so it can recreate it if needed.

The compression (the "Z" in EMZ) makes these files smaller than the original metafile would be. This saves space in your temporary folders, which is important because Windows might create dozens of these files as you work throughout the day. The files are temporary by design — they're meant to exist only as long as you're actively using that clipboard content.

How to find EMZ files on your computer

EMZ files live in your system's temporary folder, which Windows hides by default. To see them, you need to show hidden files. On Windows 10 or 11, open File Explorer, click the View tab at the top, then check the box labeled "Hidden items." Navigate to C:\Users\[YourUsername]\AppData\Local\Temp and you'll see folders and files that Windows normally keeps out of sight, including any EMZ files currently stored there.

You can also search for EMZ files directly. Press Windows key + S to open the search box, type *.emz, and Windows will show you every EMZ file on your computer. The asterisk acts as a wildcard that finds all files ending in .emz. This search might take a minute or two if you have a large hard drive.

Whether it's safe to delete EMZ files

EMZ files are completely safe to delete. They're temporary files that Windows creates on the fly, and deleting them won't break any programs or affect your documents. If you delete an EMZ file and then try to paste the graphic it came from, Windows will simply create a new EMZ file. There's no permanent loss because the original image still exists wherever you copied it from — your Excel spreadsheet, your screenshot tool, or the website you took it from.

If you want to clean up space, you can delete the entire Temp folder contents without risk. Windows will recreate the folder and populate it with new temporary files as programs need them. The only exception: don't delete the Temp folder while programs are actively running, because some software might be using files in that folder right now. Close your open programs first, then delete.

How to open and view an EMZ file

You can open an EMZ file with any image viewer or editor that supports metafiles. Windows Paint (the built-in program that comes with Windows) can open EMZ files — right-click the file, select "Open with," and choose Paint. Photoshop, GIMP, and other image editing software also support the format. Some online conversion tools can convert EMZ files to PNG or JPG if you want a more standard image format.

If you double-click an EMZ file and nothing happens, it's because Windows doesn't have a default program assigned to open it. Right-click the file, select "Open with," and choose Paint or another image program from the list. If you don't see any suitable programs, you can browse to find Paint by clicking "More apps" and scrolling down.

The difference between EMZ and other image file formats

EMZ is a metafile format, which means it stores images as mathematical instructions for drawing shapes, lines, and colors rather than as a grid of colored pixels. This makes metafiles scalable — you can enlarge them without losing quality, because the computer just recalculates the instructions at a larger size. Regular image formats like JPG and PNG are raster formats, made of pixels, so enlarging them makes them blurry.

The "Z" in EMZ means the metafile has been compressed using zipping technology, similar to how a ZIP folder works. This compression reduces file size without losing any information — when you open the EMZ file, Windows uncompresses it automatically. An uncompressed metafile would be called an EMF file instead. For everyday use, the difference doesn't matter; both open in the same programs and work the same way.

Why you might want to keep EMZ files

In most cases, you don't need to keep EMZ files. They're temporary backups, and the original graphics exist elsewhere. However, if you've copied a graphic that no longer exists in its original location — a chart from an email you deleted, a screenshot you didn't save, or an image from a website that's gone offline — the EMZ file might be your only copy. Before you delete all your EMZ files, you could search through them to see if any contain graphics you want to preserve.

If you do find an EMZ file worth keeping, open it in Paint or another image editor and save it in a standard format like PNG or JPG in your Documents folder. That way you have a permanent copy in a format that's easier to share and open on any device.

Frequently Asked Questions

Can EMZ files contain viruses or malware?

EMZ files are image files and cannot execute code, so they cannot directly contain viruses. However, like any file, an EMZ file could theoretically be disguised or used as part of a social engineering attack. If you received an EMZ file from an untrusted source, it's reasonable to be cautious, but the file format itself is safe. EMZ files created by Windows automatically are always safe.

Why does my computer keep creating EMZ files?

Windows creates a new EMZ file every time you copy a graphic to your clipboard. If you copy images frequently — pasting screenshots into documents, copying charts from spreadsheets, or working with design files — you'll accumulate EMZ files throughout the day. This is normal behavior and nothing to worry about. The files are small and temporary.

Can I convert an EMZ file to JPG or PNG?

Yes. Open the EMZ file in Paint, right-click inside the image, select "Save as," and choose JPG or PNG from the format dropdown. You can also use online conversion tools by uploading the EMZ file and selecting your desired output format. The converted file will be a standard image that's easier to share and view on any device.

What happens if I delete my entire Temp folder?

Deleting the Temp folder is safe as long as no programs are currently running. Windows will recreate the folder automatically, and programs will repopulate it with new temporary files as needed. Close all open programs first, then delete the folder. Some programs might run slightly slower the first time you use them after deletion because they need to recreate their temporary files, but this is temporary.