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....you may choose to work with form fields of your PDF documents...bookmarks, annotations, forms, form fields, signatures, stamps...