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DjVu is a digital document format with advanced compression technology and high performance value. For most scanned documents, DjVu is superior to PDF, so it has been promoted as a succedaneum of PDF. The technology of DjVu originally was developed by Yann Le Cun, Léon Bottou, Patrick Haffner and Paul G. Howard in AT&T Lab. Later, the ownership of its business development was given to several companies, including AT&T and LizardTech. In 2002, DjVu, TIFF and PDF are pitched on by the Million Book Project of Internet Archive. JCSOFT Free DjVu to PDF Changer enables you to make a conversion between DjVu and PDF. It enables you to batch converting DjVu to PDF files easily. As the scanned formats of public domain book, the easier conversion between DjVu and PDF makes online publishing easier. With JCSOFT Free DjVu to PDF Changer, you can add some metadata to your PDF files, such as author, title, subject and keywords. If you do not want others to read your PDF files, you can add a password to protect your PDF files. Stamping text or image watermark on outputting PDF files is also allowed. If you would like to add page number to PDF files, you can do it easily. Three number types are available to you. You can also define the position of page number.