How can I encrypt a PDF using 128-bit strength?
The following sample shows how to use 128-bit strength to encrypt a PDF. Make sure that the option for setting PDF key length is used with an option for setting PDF password. You can download the tool...
View ArticleIs there any good way to combine two PDF files?
Yes, you can use VeryPDF PDF Toolbox to freely combine two PDF files in different ways. If you have PDF A (containing pages: A1, A2, A3, A4 and A5) and PDF B (containing pages: B1, B2, B3), you can use...
View ArticleHow to decrypt a PDF?
In order to encrypt a PDF file, you can set two types of PDF passwords. The samples below will show you how to use three programming languages including ASP.NET, C#, and VB.NET to encrypt PDF. The tool...
View ArticleHow can I extract meta info from input PDF file to the given output file?
What is meta info?PDF meta info is the information such as title, author, creator, subject, keywords, and producer. If you have Adobe products like Adobe Acrobat and Adobe Reader, you can use any of...
View ArticleHow to rotate the first PDF page clockwise?
VeryPDF PDF Toolbox enables you to rotate specified PDF pages clockwise or counter clockwise in different programming languages like C#, ASP.NET, and VB.NET. The source code samples as follows can...
View ArticleHow to rotate an entire PDF document to 180 degrees?
With the help of VeryPDF PDF Toolbox, You can use at least three programming languages (C#, ASP.NET, and VB.NET) to rotate PDF pages. The code samples below show how to rotate an entire PDF document...
View ArticleHow can I add information from a text file to an output PDF file?
You can download VeryPDF PDF Toolbox by clicking here first and then use this tool to add PDF meta information from your text file to output PDF file in programming languages like C#, ASP.NET, and...
View ArticleHow can I add a background to a PDF file?
You can add some background to a PDF file by using VeryPDF PDF Toolbox. The code samples of C#, ASP.NET, and VB.NET as following show how to use programming languages to add backgrounds to PDF files....
View ArticleHow can I add watermark to PDF file?
VeryPDF PDF Toolbox enables you to use programming languages like C#, ASP.NET, and VB.NETto add watermarks to PDF files. If you want to view some examples of codes, please keep on reading. C#...
View ArticleHow can I blast a multi-page PDF file into several encrypted single-page PDF...
With the help of VeryPDF PDF Toolbox, you can easily burst a multi-page PDF file into multiple single-page PDF files, each of which is protected by an open password and/or a permissions password with...
View Article
