Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....> </ head > < body > < h1 > Change Comment Font Color Example...type = "file" id = "fileInput" accept = ".xls,.xlsx,.csv" /> < button...