What is DD? What Opens a DD? File Format List from WhatIs.com

File Extension

DD File Format

Compressed Archive (Macintosh DISKDOUBLER)

DD is a file extension for a compressed archive file format used by Macintosh DISKDOUBLER in Mac OS Classic.

DD files are compressed with LZ78 compression.


Learn more about DD files:

See answers to compression-related questions at IT Knowledge Exchange.

This was last updated in September 2010
Editorial Director Margaret Rouse

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