ExcelDna
A free library for creating Excel add-ins and user-defined functions using .NET languages like C# and VB.NET.
What is ExcelDna?
Excel-DNA is a free, open-source library that allows developers to create Excel add-ins and user-defined functions using .NET languages like C# and VB.NET. It solves the problem of extending Excel with custom business logic, data processing, and integration capabilities beyond what is possible with VBA or native Excel functions. The library provides a bridge between Excel's calculation engine and the .NET runtime, enabling high-performance, compiled code execution within spreadsheets.
Developers and data professionals who need to extend Excel with custom calculations, integrate external data sources, or build complex business tools using .NET technologies. This includes financial analysts, quantitative developers, and enterprise software engineers working with Excel-based solutions.
Developers choose Excel-DNA because it offers a free, lightweight alternative to commercial Excel add-in frameworks, with full support for modern .NET languages and seamless integration into Excel's interface. Its unique selling point is the ability to create high-performance, compiled add-ins without the overhead and licensing costs of traditional COM-based approaches.
Overview
Excel-DNA - Free and easy .NET for Excel. This repository contains the core Excel-DNA library.
Use Cases
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