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Determine the AutoCAD version of a drawing

To determine the AutoCAD version of a drawing, open the drawing using Notepad. The first six characters of a .dwg file identifies its version. The version identifiers for the various releases are listed below. Note that more than one release uses the same identifier when the drawing format remains fully compatible.

  • AC1021: AutoCAD 2007

  • AC1018: AutoCAD 2004, 2006

  • AC1015: AutoCAD 2002, 2000i, 2000

  • AC1014: AutoCAD Release 14

  • AC1012: AutoCAD Release 13

Caution! Do not modify the file while it is opened in Notepad. It will likely become corrupted.

If you have a program setting or customization that you would like to share with other users via this Web site, you may contact Gary Vandawalker.

Contact Information

You may send comments regarding this Web site to:

State Conservation Engineer

Peter E. Wright
Syracuse, New York
Telephone: 315-477-6538

If you encounter any problems with this page, have questions, suggestions, or find a broken link, please contact Gary Vandawalker at 315-477-6546.

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