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Open .HDX file Extension

File Type : Help Index

Compatible with: (Mac OSX 7, 8, 9, 10, 11, 12)

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.HD

ExtensionSmallImg What is .HDX file?

Help documentation file used by older versions of AutoCAD design software; uses the filename ACAD.HDX and supplies an index for an associated ACAD.HLP (.HLP) file; not used by recent versions of AutoCAD.

Recommended Software Programs to open .HDX file

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Microsoft Windows:
  • Autodesk AutoCAD 2016