iSafePDF is a free open source PDF protection software.
It allows you to encrypt PDF document, sign them using a certificate and timestamp the signature.
All those features are PDF standards so your document will be readable/editable with all standard PDF programs.
Need an alternative to iSafePDF? Read on. We've looked at the best iSafePDF alternatives available for Windows, Mac and Android.
PDFTK Builder is a free graphical interface to for PDFtk, making it much easier to use.
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jPDF Tweak is a Swiss Army Knife GUI application for PDF documents: combine, split, rotate, reorder (n-up, booklet), watermark, edit bookmarks/fileinfo/pagetransition...
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QPDF is a command-line program that does structural, content-preserving transformations on PDF files.
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PDFTools is a PDF management application. It can encrypt, decrypt, join, split, stamp, create and rearrange a PDF file. Version 1.1+ includes a very powerful and simple...
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Advanced PDF Utilities Free comes in handy when you need to deal with PDF files such as to merge or split pages, convert PDF to text & convert image to PDF or vice...
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FileProtect provides a secure digital rights management (DRM) wrapper around all your sensitive files, including Adobe PDF and Microsoft Office (Word, Excel...
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PDFEncrypt is a free, open-source Windows application that encrypts any PDF file using industry-standard encryption algorithms.
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LockPDF is a free online tool to encrypt and lock PDF files. Password protect your PDF's with a strong encryption in just a few seconds. With our easy-to-use online...
PDF Architect is a PDF Editor with free functions like rotate, delete and move pages and even more like editing text, PDF to Word, 256 Bit AES Encryption and more.
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