PDF Champ

The PDF file format is used everywhere nowadays, and there are plenty of reasons for this. It offers several advantages over other document formats, chief among which being the fixed layout of the saved files.
PDF Champ is a handy, easy-to-use application that can help you manage your documents. It allows you to encrypt or decrypt PDF files, merge multiple documents or split larger ones into several parts, generate invoices and convert files to several image formats.

Straightforward PDF management utility

Novices should find this application to be very accessible, as it features a minimalistic interface and places all the included tools within reach. However, it would have helped if some basic documentation was provided as well.
You can import individual PDF files and preview them before performing any modifications, but drag and drop actions are not supported.
The user interface is rather plain and outdated, but its layout is basic and easy to understand.

Encrypt or decrypt PDF files and apply watermarks

Securing your documents is a simple task, as you only need to specify which actions should be prohibited and, optionally, provide a password. You can also decrypt protected PDF files or replace the existing password with a new one.
Additionally, PDF Champ allows you to apply a text or image-based watermark to your documents. You can alter their opacity and specify where they should be placed, but it is not possible to fine-tune their placement.

Merge or split PDF files and generate invoices

The application can be used to split large documents into multiple parts, and you can specify how many pages each output file should consist of.
Moreover, it is possible to join any number of PDF files in order to create a larger document. If one of the source files is encrypted, you can provide its password before launching the operation.
Finally, the application includes an invoice generation utility that could be very handy if you need to manage your finances.
Overall, PDF Champ is a straightforward, reliable utility that can help you manage your documents. It integrates several useful tools and features a simple, if somewhat outdated interface.