PDFTK Builder is a free graphical interface to for PDFtk, making it much easier to use. It is a easy to use tool to collate (merge), split, encrypt, decrypt, stamp and rotate (only 90°, 180° or 270°) pdf documents.
- - PDFTK Builder is the most popular Windows alternative to LockPDF.
- - PDFTK Builder is the most popular Open Source & free alternative to LockPDF.
PDFTK Builder Features
PDFEncrypt is a free, open-source utility for Windows that encrypts any PDF file using industry-standard encryption algorithms. Simply select the unencrypted file, enter a password, and the encrypted file is generated.
It could have been called something like pdf-to-pdf. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
- - QPDF is the most popular Linux alternative to LockPDF.
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.
PDF Architect Features
PDFTools is a PDF management application. It can encrypt, decrypt, join, split, stamp, create and rearrange a PDF file.
Last version, 1.3, was released on August 2007. It is still downloadable from the official website.
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.
FileProtect provides a secure digital rights management (DRM) wrapper around all your sensitive files, including Adobe PDF and Microsoft Office (Word, Excel, Powerpoint). With FileProtect, there are no plugins to install or update — it all just works.
- - CapLinked FileProtect is the most popular commercial alternative to LockPDF.
Locklizard Safeguard PDF Security provides total PDF DRM protection and control over your documents through a multi-layered protection mechanism that does not rely on passwords.
- - Locklizard Safeguard PDF Security is the most popular Android, iPhone, iPad & Android Tablet alternative to LockPDF.
Locklizard Safeguard PDF Security Features
IGnissta PDF Lock Unlock Tool is a quick and easy to lock your personal PDF files with passwords and unlock PDF copy, print, edit securities, which offered you in free PDF unlocker demo version. Our efficient secured PDF unlock tool helps you to remove PDF restrictions.
FileOpen RightsManager is a client/server solution for encrypting and managing access to documents from your desktop. With RightsManager, you encrypt your documents locally, so there is no need to upload unencrypted documents to an unknown server.
FileOpen RightsManager Features