It's like asking to convert from Word to PDF without the help of Microsoft. It's theoratically possible, but Word is such a huge application, that in the general case, it's practically impossible, Word is still the best for this. You could connect your core apps to an opaque dedicated Windows box exposing a conversion service (don't overlook licensing issues). Otherwise, if you restrict your conversion ambitions, there are some libraries that should help (aspose, itextsharp, etc.). Also ...
c# - Convert Word doc and docx format to PDF in .NET Core without ...
How i can convert word file (.docx & doc ) to .pdf in c# without using SaveAs() or Save() method ? or without uploading on server?
Convert word file(.docx & doc) to .pdf using c# - Stack Overflow
6 I went through the Word to PDF pain when someone dumped me with 10000 word files to convert to PDF. Now I did it in C# and used Word interop but it was slow and crashed if I tried to use PC at all.. very frustrating.
How can I convert a Word document to PDF where the document contains various things, such as tables. When trying to use iText, the original document looks different to the converted PDF. Is there a...
How can I convert a Word document to PDF? - Stack Overflow
Linux has a few apps that can import a pdf as an image: LibreOffice, Okular, Calibre. But if you want editable text, then you need to install the pdf toolkit pdftk, then run the conversion utility pdf2txt. The terminal command is: pdf2txt -o output.txt input.pdf Thereafter, import the txt file into a wordpro, and complete the final editing/formatting.