The following steps show how to unlock the PDF file by removing its password using C#. Let’s open the file first and then remove its password so that everyone can access it easily. Now, I think you do not need security, that’s why you want to remove the password. Remove PDF Files’ Password in C# - Unlock PDF # Here is the code snippet that changes the current password of the PDF document.

Save the locked file having changed password using the Save method.

Change the existing password using UpdatePassword method.

Load the PDF document using Merger class and the loading options.

Prepare the update options using the new password.

Prepare the loading options using the current password.

The following steps allow you to change the current password of your PDF files within your. Let’s quickly change it programmatically with the new and difficult one. Update Existing Password of PDF Files in C# When you try to open the PDF file, the editor or viewer will ask for the password to prove your authority. The following C# code adds the password to the PDF file for security.

Save the protected file using the Save method.

Lock the file by adding password using AddPassword method.Define the password using the AddPasswordOptions class.The following steps show how to add password security to the PDF documents using C#. Let’s start by adding protection to the file by locking it with the password. You can download the DLLs or MSI installer from the downloads section or install the API in your. Along with protecting and unprotecting PDF documents, the API provides many more features like merging and splitting that are mentioned in the documentation. This API enables adding, changing, and removing password security features for the documents within the. To lock and unlock documents, we will use GroupDocs.Merger for. How to Remove PDF Password - Unlock PDF.

NET API for Password Protection of PDF Files

The following topics are discussed below: Additionally, we will change the existing password and also learn to remove the password to make the PDF unlocked. In this article, we will see how to add password protection to PDF documents to get them locked using C#. Previously we discussed adding text and image watermarks to the documents to avoid any illegal use. Let’s learn to secure our documents from unauthorized access.

How to open password protected pdf file