PDF operations like merging pdfs, adding bookmarks and compression

Question

I want to use PDF operations in c# like merging pdfs, adding bookmarks to pdf and compression of pdf so for all these things which pdf library should i use?

I need it for commercial product. I dont want to buy any paid library. I want library which is free for commercial use.

Thanks in advance

Marvin Reid · Answer

You can use the PDFFile MergeFiles method to merge pdfs. The WriteBookmarks method can be used to add a bookmark. For compression, you can use the PdfCompressorEngine SetCompression method to adjust what kind of compression you would like done. Here is documentation which demonstrates this implementation: https://www.leadtools.com/help/sdk/v22/dh/pdf/pdffile-mergefiles.html https://www.leadtools.com/help/sdk/v22/dh/pdf/pdffile-writebookmarks.html https://www.leadtools.com/help/sdk/v22/dh/pd/pdfcompressorengine-setcompression.html

Leon D · Answer

You can check Free Spire.PDF which supports all functions you mentioned. But note that it has a limitation of 10 pages. https://www.e-iceblue.com/Introduce/free-pdf-component.html Merge PDF https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Merge-PDF-Files-with-New-Method-in-C.html Add bookmarks: https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/PDF-Bookmark-Add-PDF-Bookmark-in-C-VB.NET.html Compress PDF: https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Document-in-C-VB.NET.html

Nitin Sontakke · Answer

Finding free s/w to perform operations on pdf is rather difficult and when you understand these operations then you know why. Anyway, just to give you some head start, you can start looking into PdfTk (or pdf toolkit). Note that it has command line interface, which means you can use it from within C# but it will run within it's own process space. https://www.pdflabs.com/ Hope it helps!