The XLSX and XLS file extensions are used for Microsoft Excel spreadsheets, part of the Microsoft Office Suite of software.
XLSX/XLS files are used to store and manage data such as numbers, formulas, text, and drawing shapes.
XLSX is part of Microsoft Office Open XML specification (also known as OOXML or OpenXML), and was introduced with Office 2007. XLSX is a zipped, XML-based file format. Microsoft Excel 2007 and later uses XLSX as the default file format when creating a new spreadsheet. Support for loading and saving legacy XLS files is also included.
XLS is the default format used with Office 97-2003. XLS is a Microsoft proprietary Binary Interchange File Format. Microsoft Excel 97-2003 uses XLS as the default file format when creating a new document.
Note: XLSX and XLS file formats are supported in the Document/Medical products.
LEADTOOLS supports all flavors of the Microsoft Excel spreadsheet format, from Office 97 XLS up to today's XLSX.
LEADTOOLS uses the XLSX filter to load XLSX files.
LEADTOOLS uses the XLS filter to load XLS files.
Additional features supported by LEADTOOLS:
The default extension used by this format is: XLSX or XLS.
The file constants associated with this file format are:
|Constant||Read Support||Write Support||Description|
|Xlsx||24 BPP||N/A||XLSX, Microsoft Excel spreadsheet file format|
|Xls||24 BPP||See Using Document Writers||XLS, Microsoft Excel 97-2003 spreadsheet file format|
Required DLL: Leadtools.Codecs.Xlx.dll or Leadtools.Codecs.Xls.dll. The XLSX file format requires .NET Framework 3.5 or later, as well as the DocumentFormat.OpenXml.dll (ver. 2.0). For a listing of the exact DLLs needed, based on the toolkit version, refer to XLS Format Support and XLSX Format Support
|Xls||XLS||341||✔||✔||✔||✔||✔||✔||✔||✔||application/vnd.ms-excel||XLS - Microsoft Excel 97-2003 File Format|
|Xlsx||XLSX||351||✔||✔||✔||✔||✔||✔||✔||✔||application/vnd.openxmlformats-officedocument.spreadsheetml.sheet||XLSX - Microsoft Office Excel File Format|
For a complete list for supported file formats, see Summary of All Supported File Formats.
For details of the file formats supported across products and platforms, refer to File Format Comparison Chart.
For additional support details, refer to the following topics:
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries