Document Automation APIs along with open-source SDKs to enhance Java, Python, Node.js, C# .NET, Ruby, C++, and PHP applications to view, edit, annotate, convert, compare, e-sign, parse, split, merge, extract, redact, Watermark, metadata, paraphrase, classify, repair, and translate documents of almost all the popular file formats....insert watermark in Excel files using the Excel watermarking REST...& branding with GroupDocs.Watermark....