Files that contain the .cdx file extension are most commonly associated with the CorelDRAW graphics editing application. CDX files are compressed CDR drawing files. When the CorelDRAW application is used to create a computer drawing, the file is saved in the CDR file format.
When the CDR file is compressed, it is given the .cdx file extension. This makes it easier for users to email CorelDRAW image files and transmit them via the Web.
The .cdx file extension is also used to store compound index files. These files are similar to IDX files and store information about the data that is contained within a software database.
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If you have additional information about the CDX file format or software that uses files with the CDX suffix, please do get in touch - we would love hearing from you.