Unlock PDF in C# using Aspose.PDF for .NET

Aspose.PDF Product Family
1

Hi Team,

I want to unlock and Stamp a PDF using .NET C#. I am able to Stamp PDF File but if PDF is locked / Password protected then its not working .

Request to you please help to unlock PDF.

Thanks in advance.

2

@vivekhvs

In order to load and stamp a password protected PDF file, you need to initialize the Document object using Password as in the following line of code:

Document doc = new Document("input.pdf", "{Password}");
1 Like
3

Thanks for support and help. We don’t have password for PDF because we got this PDF from my customer.

Process - Open locked PDF from customer and stamp (Approved/ Canceled) on the basis of pdf Content

So I am able to stamp unlocked pdf but not able to stamp Locked PDF

Thanks in advance.

4

@vivekhvs

We are afraid that it would not be possible to unlock a password-protected PDF without supplying a password. You must have a valid open password for the document which you are processing. Please feel free to let us know in case you need further information.