New to Telerik Document Processing? Start a free 30-day trial

Xlsx

Updated on Apr 24, 2026

Xlsx, a part of Office Open XML is a zipped, XML-based file format developed by Microsoft for representing spreadsheets and is one of the supported formats by RadSpreadProcessing and RadSpreadsheet.

Xlsx File Unzipped

Rad Spread Processing Formats and Conversion Xlsx 01

XlsxFormatProvider is compliant with the latest Office Open XML standard - ECMA-376 4th edition, December 2012.