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DWGsignCAD Studio - DWGsign

Protect your DWG content by adding a unique invisible watermark signature

DWGsign for AutoCAD (and vertical versions)

CADstudio DWGsign is an add-on utility for AutoCAD which watermarks your DWG drawing document (project, block or template) with a permanent invisible signature containing your or your company's name. This add-on tool helps to protect your intellectual property (IP) as you can prove the ownership of the original content in any future DWG files which are based on this signed document. Your original signature can be viewed using the free DWGsign Reader application.

You can "sign" individual DWG files or your templates. If you sign your company template (.DWT), all new drawings based on this template will be automatically "signed" (watermarked).

DWGsign dialog

DWGsign does not prove unmodified state of the original document (like digital signature does), it proves that a document is based on your original data. Non-authorized users (even in your company) cannot remove the DWG signature. The signature remains part of the DWG file even if the DWGsign utility is not installed on a workstation.

This application is compatible with the AutoCAD 2015, 2016, 2017, 2018, 2019 and 2020 families (64-bit, any language version). DWGsign is available in English, French and Czech.

How does it work?

DWGsign adds the specified authorship signature in encrypted format to internal data structures inside the DWG file. This signature survives any future modifications of that DWG drawing.


Click the DWGsign icon in the Add-in ribbon or type the DWGSIGN command to bring up the DWGsign dialog. The dialog shows whether the drawing (document) is signed by someone and by whom (green) or not (blue), or whether it contains parts (blocks) signed by other parties. Here you can also perform the following functions:

  • Sign, add signature to a yet unsigned document (you cannot re-sign a signed document)
  • Remove signature, delete your own signature from a signed document (you cannot remove foreign signatures) if you have a special signature-removal security password, supplied with your license
  • Change password to change your signature-removal password

On the first run of DWGsign, you will be prompted to specify the location of your individual unique .sign file obtained with the purchased application.


DWGsign Reader

DWGsign Reader CADstudio DWGsign Reader is a free add-on utility for AutoCAD (+verticals) which checks any watermarks/signatures (added through the full DWGsign add-on application) in your DWG drawings. You can use it to verify and prove ownership of your DWG content on any AutoCAD workstation.


Exchange Apps You can buy the DWGsign application from the Autodesk Apps store (click the icon) or directly here Buy DwgText (for AutoCAD 2015/2016/2017/2018/2019/2020)

Price of the DWGsign license is 99 USD. The application is licensed per computer, multi-license discounts apply. You will receive your unique .sign file with the encrypted specified text - e.g. your company name, plus a signature-removal password.

Exchange Apps You can download the free DWGsign Reader also from the Autodesk Apps store (click the icon).

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