Summary

・Merge PDF Documents
・Split PDF Pages into a New Document
・Decrypt Input as Necessary (Password Required)
・Encrypt Output as Desired
・Fill PDF Forms with FDF Data and/or Flatten Forms
・Apply a Background Watermark
・Report on PDF Metrics, including Metadata and Bookmarks
・Update PDF Metadata
・Attach Files to PDF Pages or the PDF Document
・Unpack PDF Attachments
・Burst a PDF Document into Single Pages
・Uncompress and Re-Compress Page Streams
・Repair Corrupted PDF (Where Possible)

  複数のPDFをマージ/分割．
  暗号化/復号化．
  フォームに入力．
  電子透かしを入れる．
  再圧縮．e.t.c.

Reference

  pdftk - the pdf toolkit
  http://www.accesspdf.com/pdftk/

via

  Tokulog! - 2004-08-30
  http://tokuhirom.tdiary.net/20040830.html#p08