by Manuel De Leon

ClosedXML is a .NET library that makes it easy to create, manipulate, and read Excel 2007+ (.xlsx) files.

Operating system: Windows

Publisher: Manuel De Leon

Antivirus check: passed

Last revision: Last week

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ClosedXML is a .NET library that provides a simple API for reading, manipulating, and writing Microsoft Excel 2007/2010/2013 files (BIFF12 format). It allows developers to create robust applications for manipulating spreadsheets without having to rely on Microsoft Excel.

Using ClosedXML, developers can quickly and easily create and modify Excel spreadsheets without needing to use the Excel application.

ClosedXML provides a comprehensive set of features for working with Excel files, including:

• Easy to use and intuitive API: ClosedXML makes it easy to create, modify, and read Excel documents with just a few lines of code.

• Support for all Excel features: ClosedXML supports all standard Excel features, including formulas, charts, images, named ranges, and protection.

• Open XML file format: ClosedXML uses the open XML file format, making it easy to work with Excel files in a variety of applications.

• Cross-platform compatibility: ClosedXML is compatible with multiple platforms, including Windows, macOS, and Linux.

• Automation: ClosedXML provides advanced automation features, such as auto-fill, auto-formatting, and auto-calculation.

• Version control: ClosedXML supports version control, allowing you to easily track changes to your Excel documents.

• Performance: ClosedXML is designed for maximum performance, allowing you to quickly and easily read, write, and manipulate Excel documents.

• Security: ClosedXML provides secure access to sensitive data, allowing you to protect your Excel documents from unauthorized access.

• Support for multiple languages: ClosedXML is available in multiple languages, including English, Spanish, French, German, Italian, and Portuguese.

• Compatibility with other libraries: ClosedXML is compatible with other .NET libraries, such as NPOI and EPPlus.

• Free and open source: ClosedXML is free and open source, making it accessible to all developers.


ClosedXML is a powerful and easy to use library for working with Microsoft Excel documents. It provides a comprehensive set of features for working with Excel files, including support for all standard Excel features, open XML file format, cross-platform compatibility, automation, version control, performance, security, and support for multiple languages. It is free and open source, making it accessible to all developers.
ClosedXML is a software library for working with Microsoft Excel documents, and it runs on Windows machines. It requires .NET Framework 4.5 or later, and it works with the following versions of Microsoft Excel: 2010, 2013, 2016, or Office 365. It also requires Visual Studio 2012 or later.
image/svg+xmlBotttsPablo Stanley Körner
Leo Gaven

I have used ClosedXML software for a couple of projects and have found it to be a great tool for creating and manipulating Excel spreadsheets. It is particularly useful for generating complex Excel documents in an automated fashion. It's easy to use, has great documentation and it's free to use. I was able to quickly generate spreadsheets with multiple worksheets, formulas and charts. It is also very efficient in memory usage and can handle large datasets with ease. I found the ability to work with multiple worksheets at once very useful. I also like how easy it is to add new styles and formatting to the documents. Overall, ClosedXML has been a great tool for working with Excel spreadsheets.
image/svg+xmlBotttsPablo Stanley Körner
Jay M******g

ClosedXML is a great tool for manipulating Excel files. I found it to be very simple to use and the documentation is also helpful. Generating worksheets and adding data to them is easy and straighforward. The API is very usefull and its easy to navigate through. It's also fast, which is a bonus. I have encounted a few issues with it but they were easily fixable.
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