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LockPDF Alternatives

LockPDF is described as '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 protection tool, simply upload your PDF, set your password, and download the secured PDF ready for sharing' and is an website. There are more than 10 alternatives to LockPDF, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is PDFTK Builder, which is both free and Open Source. Other great sites and apps similar to LockPDF are QPDF, PDFEncrypt, PDF Architect and PyPDF2.

LockPDF alternatives are mainly PDF Editors but may also be Document Managers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of LockPDF.
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LockPDF iconLockPDF
  • FreeProprietary
  • Online

LockPDF is a free online tool to encrypt and lock PDF files. Password protect your PDF's with a strong encryption in...

Learn more about LockPDF

  1. 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.

  2. QPDF icon


    • FreeOpen Source
    • Windows
    • Linux
    • BSD

    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.

    No screenshots yet

  3. PDFEncrypt icon


    • FreeOpen Source
    • Windows

    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.

    The main PDFEncrypt interface.  It's easy to use.
  4. 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.

  5. PyPDF2

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    PyPDF2 - A utility to read and write pdfs with Python.

    Use it with Python

  6. 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.

    Main Screen
  7. iSafePDF icon


    • FreeOpen Source
    • Windows

    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.

  8. 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 versa. This multipurpose program comes with its nice, clean user interface covering most functions.


    The site has a bad reputation on WOT ( and SiteAdvisor identifies it as suspicious.

    Preview PDF Files
  9. 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.

    No screenshots yet
  10. Locklizard Safeguard PDF Security icon

    Locklizard Safeguard PDF Security

    • Mac
    • Windows
    • Android
    • iPhone
    • Android Tablet
    • iPad

    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 Writer 1
Showing 10 of 16 alternatives