PDF Security Manager for Windows

Easily add open password or permissions to protect PDF documents.

Version 1.1.0 for Windows

Mac version is also available


Manage PDF security with ease

With Lighten PDF Security Manager, you can limit access to a PDF file by adding an open password, or by restricting certain features, such as copying, printing or editing.

Two types of passwords are available

You can encrypt PDF document with following password securities:

Document Open Password (also known as a User password) User must type in the correct password to open the PDF.


Permission password (also known as a master password) Recipients don't need to enter the password for opening and viewing the document. However, they must type the permission password if they want to use the certain restricted features, such as copying, printing and more security options.

pdf security manager encrypt pdf

Flexible Permission Options

There are various permission options available if you add permission password to a PDF file.

Printing Restrictions: You can prevent users from printing the PDF, or lets users print but in low quality (no higher than 150 dpi).

Changes Permissions:

* Inserting, Deleting, And Rotating Pages

* Filling In Form Fields And Signing Existing Signature Fields

* Commenting, Filling In Form Fields, And Signing Existing Signature Fields

* Page Layout, Filling In Form Fields, And Signing

* Any Except Extracting Pages

Copying Restrictions: Enable Copying Of Text, Images, And Other Content

pdf security manager unlock

Efficient and Easy-to-use

* Easy-to-use, only 3 steps to manage PDF security settings

* Encrypt multiple PDF files with the same security setting at one time. For example, you can add 100 PDF files, and set a permission password to limit the copying and printing features. 

pdf security manager easy

Remove Password Security

Besides adding security setting, you can also remove security setting if you have the permission to do so.

If you know the open password, enter the open password, then you can remove it from the document. If the document has a permissions password, you can also remove the permissions directly. So managing the security of a PDF document can not be easier.

Important: If you forget a password, you cannot recover it from the PDF. Consider keeping a backup copy of the PDF that isn’t password-protected.

pdf security manager ui

Guide for PDF Security Manager for Windows

Product tutorials

* How to Encrypt a PDF file with Lighten PDF Security Manager?

System Requirements

Operating System: Microsoft Windows®10, 8, 7, Vista and XP (all editions)
Does not require Microsoft office and Adobe product installed
Recommended hardware Processor: 2GHz Processor RAM: 1G
Free Space: File Size: 6.43MB, 100MB recommended