This software enables you to split PDFs according to specified page ranges or numbers, as well as random ranges/numbers, and merge files by sorting and combining them efficiently.

The program is efficient in retaining bookmark positions to new positions in the output PDF. It supports virtually any flavor for PDF formats, making it very versatile. Unlike most PDF utilities that tend to slow down when processing files with a large number of pages, PDFappend has been shown to perform at remarkable speeds to the last page.
PDFappend is user-interactive software that can concatenate, append and split PDF files. Despite being feature-rich, the program is straightforward to use. Its performance benchmark tests have shown that it is currently the fastest concatenate, append and split utility available today.
With PDFappend, users can easily:
- Append a PDF file to an existing PDF file
- Fuse PDF files in any order
- Append a page or several pages to an existing PDF file
- Split PDF documents by page numbers or custom page ranges
- Split a file into single pages or sets of pages
Overall, PDFappend is a useful, high-performance PDF software that simplifies and streamlines the process of working with PDFs.
Version 4.0.1.5: Support for all splitting and merging