Get in contact with us

Sometimes a conversation is much easier than any documentation can be. We always appreciate receiving feedback and if you have questions about using pdfToolbox in your environment, we encourage you to get in contact.

Technical questions or comments

To ask a technical question or problem, you can use the "Report a problem" form on the callas software website.


  1. Go to the callas software web site at
  2. Hover over the "Support" item in the menu.
  3. Click on the "Report a problem" item in the "Support" menu.

Alternatively, you can also send email to "". When sending support files that are over 2MB, it is more reliable and quicker to send them to us through our Dropbox.

Please provide as many details as possible when you contact us, so that we can help you as quickly and efficiently as possible.

Other questions or comments

For all other questions or comments about pdfToolbox or any of the other callas software products, please write and we will help you as quickly as possible.