Java PDF Library FAQ

Java PDF Library FAQ

This is the list of frequently asked questions for Qoppa’s Java PDF libraries and components. If you don’t find the answer to your question, don’t hesitate to ask us at or visit our developer knowledge base.

Licensing Questions

What is the difference between server license and distribution license?
Our library products pricing has two models according to where the software is running, either on a server, or on clients computers.

You need to purchase a server license if the library is running on a server (one copy of the library serves many users).

You need to purchase distribution license if the library is running on your users’ machines. Please contact us at for distribution pricing.

What is your policy for support?
Support is included in the annual licensing fee. We try our best to answer all inquiries within 24 hours. If a fix is needed, we are usually able to produce a new build within a few days.

Do you offer eternal license?
We have recently switched our model to yearly license, which includes upgrades, support and server transfers.

Technical Questions

We are seeing a demo version watermark on the output PDFs. How can we resolve this?
The watermark means that the library is running in demo version. If you have not purchased yet, contact If you have already purchased, contact There may have been changes to your server which invalidated the license info.

What versions of Java does your library support?
All our library products are compiled using Java 6 and are compatible with Java 6 and over. We distribute all our library demo applications, as well as our end-user and server applications, with Java 8, so it is the most reliable version of Java to use with our libraries as it is the most tested.