C# Excel library that reads, writes, and edits XLSX, XLS, CSV, and TSV files without Microsoft Office or Interop. Runnable .NET examples for formulas with auto-recalculation, range arithmetic (Sum/Max/Avg), formatting, DataSet conversion, and JSON export. Alternative to EPPlus and Excel Interop on Linux.

C# OCR library that extracts text from images, scanned PDFs, and multi-page TIFFs in 125 languages, built on a tuned Tesseract 5 engine. Runnable .NET examples for image-to-text, PDF-to-text, hOCR export, barcode detection, and preprocessing filters (deskew, denoise, contrast). .NET 8/7/6/Framework.

C# PDF library that converts HTML to PDF using a real Chromium renderer with full CSS3 and JavaScript support. Runnable .NET examples for generating PDFs from HTML, URLs, and images, plus merging, splitting, digital signatures, form filling, headers and footers, and password protection. .NET 8/7/6/Framework.

C# barcode and QR code library that reads and generates Code 39/93/128, EAN-8/13, UPC-A/E, PDF417, Aztec, Data Matrix, QR, Micro QR, and rMQR from images, PDFs, and streams. Runnable .NET examples for batch scanning, image preprocessing, styling with logos, error correction, and SVG export. ZXing alternative.

C# PowerPoint library that creates, reads, and edits PPTX presentations without Microsoft Office or Interop. Runnable .NET examples for slide generation, text boxes with styled paragraphs, image insertion, shapes (rectangle, ellipse, cloud, and more), and slide layout. .NET 10 through Framework 4.6.2.

C# Word library that creates, reads, and edits DOCX files without Microsoft Word or Interop. Runnable .NET examples for paragraphs, text runs with styling, tables with cell merging, images, shapes, page setup, find-and-replace, and MemoryStream export for HTTP delivery. .NET 10/9/8 through Framework 4.6.2.