XLSX 2007 onwards

spreadsheet

From Microsoft Office 2007 onwards, the core output format of MS Excel has been based on the Office Open XML (OOXML) file format. The ISO standard for OOXML is ISO/IEC DIS 29500. An OOXML file format consists of a compressed zip archive that is designated according to which file type it is. Further detail on OOXML can be found within fmt/189 - Microsoft Office Open XML.

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Open it

• fmptoolsOpen sourcewrites · MIT License
• LibreOffice CalcOpen sourcereads and writes · Mozilla Public License, version 2.0
• Q2025399Open sourcewrites · Eclipse Public License 2.0
• ABBYY FineReader 11writes · end-user license agreement
• Microsoft Access 2000reads and writes
• Microsoft Office Outlook 2007writes
• WPS Spreadsheet 2013reads and writes
• Gretlreads
• Microsoft Excelreads · end-user license agreement
• Skysitereads

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Sources

• File Formats Wiki
• PRONOM fmt/214
• Wikidata Q63082925

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-26.

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