Coolmuster PDF Encrypter

There are many reasons why you want to encrypt your PDF documents. But what is the simplest way to achieve it? Here, we could like to strongly recommend Coolmuster PDF Encrypter for your reference. With it, you can encrypt your PDF files anytime you want.

* Set User Password (Open Password) to PDF to prevent PDF from opening directly.
* Add Owner Password to a PDF document to protect PDF from reuse.
* Support 3 different encryption systems: 40 bit RC4, 128 bit RC4 and 128 bit AES.

Supported OS:

  • 3 levels for encryption, batch set password, more personalized options to protect privacy of PDF and so on. It is the most outstanding application I've used! - Reviewed by Tina


Add User and Owner Password to Your PDF Files As You Like

The content in the PDF may be private and you don't want other people to see it. The information contained in the PDF is valuable, it could be a training course, bid file, healthcare record, price list or a consulting report. Any way, you don't want to lose them. Then just try to use this PDF Encryption program to add a password to protect your own PDF files.

Add User Password: You can set just a user password to control the opening permission of your PDF. Only those who know the user password can open your PDF.

Apply Owner Password: You can control the access permissions like copying, modifying, and high quality printing, with an owner password.

3 Different Security Levels for Your Reference

For different situations, you may have different encryption needs in the daily life and work. So CoolMuster PDF Encrypter provide users with 3 levels of encryption system: 40 bit RC4, 128 bit RC4 and 128 bit AES.

40 bit RC4: This is the lowest password protection which allows users to protect PDF document from printing, copying or editing individually.

128 bit RC4 is higher than 40 bit RC4. It offers more detailed options for use to apply restrictions for PDF document.

128 bit AES is undoubtedly become the highest password protection levels. It means Advanced Encryption Standard that gives stronger security measures to your file.

Various Options for PDF Security

Besides password and encryption level, there are also lots of other options for your reference, such as resolution settings, document printing, copying, etc. You're enabled to select all you wanted options with one click.

You are allowed to permit one or more privacies freely while preserving rest securities for your PDF document.

In 128 bit RC4 and 128 bit AES modes, you are allowed to release more privacies for your document.

More Other Attractive Features

The PDF Encrypter comes with various powerful features. Besides the features we list above, it is also has many other attractive features:

Drag and drop operation is supported that you can drag all existing PDF files that you want to encrypt together at one time to the program interface directly.

No advertising plugin or spyware, no viruses.

No matter how large your PDF file is, you can finish the encrypting process within 3 simple steps.

More Features


No need for any other third-party program to be installed on your computer while you're running this handy PDF Encrypter.

Easy to Use

No requirement of any technical skills for both beginners and experts. You can handle it easily.

FREE Technical Support

Provide all users with free 7*24 technical supports. You can contact our technical team anytime you like.


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