Hacker

C# Excel Library In-Depth Comparison: Tested for 2026

Each profile below follows the same structure: what the library is, a code example performing the standard task (create workbook, write data, save), its genuine strengths and limitations, and who ...
GitHub

A Zig framework for building Excel XLL add-ins including streaming data and Lua scripting support.

XLL add-ins are native DLLs that run inside the Excel process with no serialization or IPC overhead. Excel calls your functions directly and can parallelize them across cores during recalculation. The ...
GitHub

NanoXLSX is a small .NET library written in C#, to create and read Microsoft Excel files in the XLSX format (Microsoft Excel 2007 or newer) in an easy and native way

NanoXLSX.Reader 🔵 Optional, Bundled Extension methods to read/load XLSX files. Depends on Core NanoXLSX.Writer 🔵 Optional, Bundled Extension methods to write/save XLSX files. Depends on Core ...
Hacker

The Top C# .NET Excel API Libraries

MESCIUS inc. (formerly GrapeCity) provides JavaScript and .NET grids, UI, reporting, spreadsheets, document APIs, etc. MESCIUS inc. (formerly GrapeCity) provides ...
Microsoft

Use Open XML to Extend the Excel Buffer Functionality (Part 2 of 2)

In Microsoft Dynamics NAV, there are several areas that enable the user to perform analysis in Microsoft Excel. Areas such as importing and exporting budgets, analysis by dimensions, and a number of ...