If you have order problems or questions, please let us know. If you lost your registration
code, let us help you. Please include your name, address, email address, and order
confirmation number (if you have it). We will be happy to help you.
Your feedback and support helps us to continue improving our software and provides
you improved software with more features in the future. Please send your feedback
Frequently Asked Questions
1. Are PDFdu PDF Tools compatible with Windows 8?
Yes. All the PDF tools of PDFdu are compatible with Windows 7, 8,10, Vista and Windows
2. How to update PDFdu programs to the latest version? Is it free?
All updates are free. You can update your PDFdu programs whenever there is new version
To check if you are running the latest version, click the Help menu in the program
interface, and then click "About" for New Versions.
3. Do I have to update the program every time there is a new version?
We constantly make major or minor updates to PDFdu Free PDF softwares with improvements
based on the feedback from our users like you. If you feel the current version you
are using is OK, you can ignore the updates and continue to go with it. Downloading
setup program of large file size could be time-consuming, anyway.
4. Cannot install PDFdu PDF Tools. Why?
First of all, please check if your computer system allows you to install PDFdu programs.
Second, check if the setup of PDFdu was mistakenly blocked by your anti-virus software.
Turn off the anti-virus program during the installation process to have a try.
The last possible is that the setup file was broken during the downloading, you
may download it once again from our
In the near future, we would add lots of more fantastic functions, such as add watermark,
and even direct editing PDF files.