GemBox.Spreadsheet Free

GemBox.Spreadsheet is a .NET component that enables any developer to write, read or convert spreadsheet files (XLS, CSV, XLSX, HTML or ODS) from their .NET programs using one simple API.

GemBox.Spreadsheet requires only .NET Framework and is many times faster than Excel automation object. GemBox.Spreadsheet Free is free of charge while GemBox.Spreadsheet Professional is a commercial version (licensed per developer).

Performance. In the case of desktop application, you don't want your user to wait 20 seconds for every single report. In the case of web application, you want your server to simultaneously support as much users as possible. Our test programs generate single XLS file with 200 rows and 100 columns of tabular data. Half of the values are strings and half are numbers, with 50% of cells having some cell style applied (font size and border).

100% managed code. Many of the competing products (and actually Microsoft Excel object) are old COM components with .NET RCW (Runtime Callable Wrapper). That brings many performance and interoperability disadvantages as every method call you make goes through the wrapper until it reaches C++ code. On the other hand, our GemBox.Spreadsheet component is 100% managed, written entirely in C# and designed to support both Visual Basic .NET and C# in equal manner.

Clean and easy to use API. GemBox.Spreadsheet is a designed and developed to conform to Microsoft standards for .NET libraries.