The File Extensions Database

.CDX File Extension

  • Developer by: Microsoft
  • Category: Data Files

What is an .CDX file?

.CDX is Compound Index File

Index of files or other data contained in a database; similar to a compact index (.IDX) file, but the leaf nodes at the lowest level of a compound index point to one of the tags in the index.

The compound index is the native database index format used by FoxPro.

Programs that open Compound Index File
Microsoft Visual FoxPro
File Type 2 Alpha Five Table Index File
Developer by: Alpha Software Category: Developer Files

Index file utilized by Alpha Five, an IDE for Web application developers; contains table index data referenced by Alpha Five to find table records; created when index fields in the table are defined and intended to order lists in your data file; can only hold index names up to ten characters long with no spacing; similar to .DDX, .ALX, and .ASX Alpha Five index files.

When backing up your data, verify that the CDX file is being saved as well. Otherwise, when the .DBF and .FPT file data is only restored, the CDX file will hold lists from old data and Alpha Five will have to create new lists for the restored data, which may take time.

NOTE: In 2013, Alpha Five became Alpha Anywhere.

Common CDX Filenames

[Name of your table].cdx - When a table is created and the index field is defined, the CDX file will be created with the same name as your table.

Programs that open Alpha Five Table Index File
Alpha Software Alpha Anywhere
File Type 3 CorelDRAW Compressed File
Developer by: Corel Category: Vector Image Files Format: Binary

File created by CorelDRAW, a vector-graphics editing program included with the CorelDRAW Graphics Suite software package; contains a compressed .CDR drawing file; used to reduce the storage space required for a drawing.

CDX files are useful for sending smaller files over email, or for archiving drawings on external media.

Programs that open CorelDRAW Compressed File
CorelDRAW Graphics Suite 2018
File Type 4 ChemDraw Exchange File
Developer by: PerkinElmer Category: Data Files Format: Binary

Chemical information file created by ChemDraw, a molecule editing program suite for Macintosh and Windows platforms; stores molecular data in a tagged binary format; used for storing accurate chemical drawings.

CDX files store information such as atoms, bonds, fragments, arrows, and text.

The CDX format is the native format used by ChemDraw. Another format called CDXML (.CDXML files) is used for exporting and exchanging CDX data in an XML format.

Programs that open ChemDraw Exchange File
PerkinElmer ChemDraw
Open Babel
PerkinElmer ChemDraw
Open Babel
Open Babel
File Type 5 ConceptDraw PRO XML Document
Developer by: Computer Systems Odessa Category: Vector Image Files Format: XML

XML diagram file created by ConceptDraw PRO, a technical drawing program; stores the XML version of a binary .CDD file; used for transferring drawing information in an XML exchange format, which is easier to read than the binary version.

Programs that open ConceptDraw PRO XML Document
CS Odessa ConceptDraw PRO
CS Odessa ConceptDraw PRO

How to solve problems with CDX files

  • Associate the CDX file extension with the correct application. On :
    Windows: Right click on any CDX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CDX files". Mac: Right click (or Ctrl-click) the CDX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CDX is Compound Index File. Because only the current version supports the latest CDX file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .CDX is Compound Index File update.
  • To make sure that your CDX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.