C# .NET Core, Java, Python, PHP, Node.js, Python, JavaScript, C++, Android, Swift, Go, Ruby, Dart, Perl APIs to create and convert PDF, Word, Excel, PowerPoint, email, JPG, image, ZIP, and other formats on Windows, Linux, macOS & Android....3d to pdf 1 add comments to pdf 1 add comments to word document...combine word documents 1 commenting pdf 1 compare 2 word documents...