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.... The conversion from OBJ to STL is essential...Java, a powerful and flexible API for all your 3D file manipulation...