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A-PDF Password Security

box of A-PDF Password SecurityA-PDF Password Security is a desktop utility program that lets you change password security of existing Acrobat PDF files. That means you can protect PDF files with 128 bit encryption, or remove existing password protection. It can handle either single or batch documents. Another convenient features include password pool and hot directory.


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how a-pdf password security work

Why A-PDF Password Security

Encrypt PDF Files

Protect your PDF documents from unauthorized access with standard password security:

  • 40-bit RC4 encryption, which is supported by Adobe Acrobat 3.0 or above.
  • 128-bit RC4 encryption, which is supported by Adobe Acrobat Reader 5.0 or above.

Decrypt PDF Files

You can also remove the standard password security from protected PDF files. Supports 40/128 bit RC4 and 128 AES encryption.

Note: you may get a password prompt to open the file. If you have no idea what password is, the program can not find passwords automatically for you, you may find a PDF password cracker tool here.

Change Restrictions of PDF Files

With A-PDF Password Security, you can set a PDF file to require a password to open, and/or restrict access. For example, to allow or not allow printing, copying content, changing the file, etc.

Batch Change Properties of PDF Files

With A-PDF Password Security, you can batch edit and modify your PDFs metadata, such as PDF Title, Subject, Author and Keywords.

Add Expiry Time and Data to PDF Files

With A-PDF Password Security, you can set or remove expiration Time and Date on a PDF.

Note:The expiry date feature is only working with pdf readers with javascript.

Password Pool

If you need unsecure a batch of PDF files with one password, you can special a password pool. A-PDF Password Security will try the passwords one by one, instead of input them manually.

Work with Hot Directories

You can set up a monitored directory, where all files written to that directory will be encrypted as they are saved. The original files can also be moved to a backup directory. All of the operations will be recorded in log files.

work with hot directory

Modify Metadata

A-PDF Password Security can also modify the metadata(properties) at the same time. Includes Title, Author, Subject and Keywords. It support keeping original data using macro if you just want to modify some of metadata in a batch job.

Enable/Disable Expiry

It can make the PDF expired in a certain date. The Acrobat Reader will prompt the expired information when the date exceed.

Save Money

A-PDF Password Security is a standalone program costing only $27. It does NOT require Adobe Acrobat Pro, which costs hundreds of dollars.


buy now   download free
only $27   Free download trial version

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Current version 3.4.0


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Requirement: Windows


work with vista