Pdftk is a handy tool for manipulating PDF. It is a command-line tool for working with PDF documents. If PDF is electronic paper, then pdftk is an electronic staple-remover, hole-punch, binder, secret-decoder-ring, and X-Ray-glasses. Pdftk is a simple tool for doing everyday things with PDF documents.

Pdftk Features:
1. Merge PDF Documents
2. Split PDF Pages into a New Document
3. Rotate PDF Pages or Documents
4. Decrypt Input as Necessary (Password Required)
5. Encrypt Output as Desired
6. Fill PDF Forms with FDF Data or XFDF Data and/or Flatten Forms
7. Apply a Background Watermark or a Foreground Stamp
8. Report on PDF Metrics such as Metadata, Bookmarks, and Page Labels
9. Update PDF Metadata
10. Attach Files to PDF Pages or the PDF Document
11. Unpack PDF Attachments
12. Burst a PDF Document into Single Pages
13. Uncompress and Re-Compress Page Streams
14. Repair Corrupted PDF (Where Possible)

Pdftk allows you to manipulate PDF easily and freely. It does not require Acrobat, and it runs on Windows, Linux, Mac OS X, FreeBSD and Solaris

The license of this software is Free, you can free download and free use this pdf software.