Free Spire.XLS for .NET is a Community Edition of the Spire.XLS for .NET, which is a totally free Excel API for commercial and personal use. As a standalone .NET library, Free Spire.XLS for .NET enables developers to create, manage and manipulate Excel files on any .NET(C#, VB.NET, ASP.NET, .NET Core) applications.

Free Spire.XLS for .NET is a standalone Excel .NET library and does not depend on Microsoft Office Excel. It supports both for the old Excel 97-2003 format (.xls) and for the new Excel 2007, Excel 2010, Excel 2013, Excel 2016 (.xlsx, .xlsm).

Friendly Reminder:
Free version is limited to 5 sheets per workbook and 200 rows per sheet. This limitation is enforced during reading or writing XLS or PDF files. From Free Spire.XLS v7.8, there is no any limitation when loading and saving .xlsx file format. When converting Excel files to PDF files, you can only get the first 3 pages of PDF file. Upgrade to Commercial Edition of Spire.XLS
Free Spire.XLS for .NET
Pro Edition $799

Spire.XLS Pro Edition supports converting files from Excel to PDF, HTML, Excel to CSV, Excel to Text, Excel to Image and Excel to XML(the Excel can be either .XLS or .XLSX) and it is included in Spire.XLS Pack.
Standard Edition $599

Spire.XLS for .NET Standard Edition only can be used for .NET and doesn't support print and conversion function.
Free Edition $0

Free version is limited to 5 sheets per workbook and 200 rows per sheet. This limitation is enforced during reading or writing XLS or PDF files. From Free Spire.XLS v7.8, there is no any limitation when loading and saving .xlsx file format. When converting Excel files to PDF files, you can only get the first 3 pages of PDF file.
Only Free Spire.XLS, No Microsoft Office Automation

Free Spire.XLS for .NET is a 100% standalone Excel .NET library without requiring Microsoft Excel or Microsoft Office to be installed on the system.
Powerful & High Quality Excel File Conversion

Free Spire.XLS for .NET has powerful conversion ability and it enables converting Excel files to most common and popular formats.
Create Excel Report from Comprehensive Workbook Designer

Free Spire.XLS for .NET enables developers to generate Excel workbook from scratch, or load a workbook from either folder or file stream. Developers can also save it to file, file stream or web response. Free Spire.XLS for .NET offers a wide range of security features including Excel encryption/decryption, cells hide/unhide, and worksheets lock/unlock.
Freely operate worksheet

Free Spire.XLS for .NET enables developers to create, add, delete, rename, edit and move worksheet in either C#, VB.NET or ASP.NET. Developers can also copy, move, and consolidate across worksheets with full contents. This professional Excel .NET class library also embeds many flexible options for displaying worksheets, such as page breaks, zoom-setting, freeze panes, headers/footers, print paper size and print area etc.
Easily Manipulate cells & Excel Calculation Engine at run time
  • Free Spire.XLS for .NET supports merge/unmerge excel cells, add/delete excel cell, insert excel rows and interiors, hide/unhide excel rows and columns, freeze/unfreeze Excel Panes.
  • Free Spire.XLS for .NET supports add, read and calculate Excel formulas.
Chart, Data and other Elements