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.mmc File Extension

Developer: Microsoft
File type: Microsoft Media Catalog
You're here because you have a file that has a file extension ending in .mmc. Files with the file extension .mmc can only be launched by certain applications. It's possible that .mmc files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .mmc file?

The Microsoft Media Catalog is stored in the MMC format and is affixed with MMC extension and is used by Microsoft Clip Gallery. These MMC files are generally classified as data files that contain image collection in an organized format similar to a clipart gallery. These files are saved in the \Application Data\Microsoft\Media Catalog directory. One example of an MMC file is the "Artgal50.mmc" catalog file that contains images, keywords, and thumbnail previews used by Clip Gallery. The Microsoft Clip Gallery software application allows user to preview clip art, photos, bitmaps, scanned images, drawings and other graphics, sound effects, music, videos, animated Graphics Interchange Format (GIF) pictures, and other clips and insert them in Microsoft Office documents. It features browser-like user interface, drag and drop clip organizing, and automatic Clip gallery access from the Start Menu. The Microsoft Clip Gallery software can be used in Microsoft Windows based systems to access and view MMC files.

how to open a .mmc file?

Launch a .mmc file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mmc file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mmc files aren't yet associated with it. In this case, when you try to open a .mmc file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mmc file will open the correct application. Click here to fix .mmc file association errors

applications that open a .mmc file

Microsoft Clip Gallery

Microsoft Clip Gallery

Microsoft Clip Gallery contains thousands of clipart images, including digital art, buttons and icons, borders and dividers, vector graphics, and stock photos. Images are grouped under different categories, such as animals, food, nature, people, sports, special occasions, seasons, and symbols. Users can download them through any Microsoft Office application or directly from the gallery's individual pages where more information about the image is displayed. Users can search for images to download based on keywords they're tagged with or through the category pages where images appear as thumbnails. Each thumbnail has a link to download the image in its original size. The images are sorted by their relevance to keywords or by their upload date. Users may filter down the images displayed according to their media type, image size, and source. Small images have less than 250 pixels in height and width while large images have more than 600 pixels.

a word of warning

Be careful not to rename the extension on .mmc files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .mmc. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.
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