[Document Editor APIs for .NET Open Source .NET Editor Libraries Effortlessly edit PDFs, DOC/DOCX, and XLS/XLSX in .NET apps using Free & Open Source Document Editor APIs. Document Editor APIs for .NET Include DocX Open source .NET DOCX library to create and edit DOCX documents. ExcelDataReader Open source .NET API to read XLS, XLSX, CSV and XLSB files. FileFormat.Cells for .NET Open source .NET API to create, edit and convert Excel XLSX files. FileFormat.Slides for .NET Open source .NET API to create and edit PowerPoint PPTX documents. FileFormat.Words for .NET Open source .NET API to create and edit Word DOCX documents. MimeKit Open source .NET Email library to create and edit MIME documents. MSGReader Open source .NET Emailing Library to Open and Read Outlook MSG and EML files. PDFSharp Open source .NET PDF Library to create and edit PDF documents. QuestPDF Open source .NET PDF Library to create and edit PDF documents. ShapeCrawler Open source .NET PPTX API to create and edit PPTX presentations.]