Convert XLSX to XML Online

Convert XLSX to XML - Complete Guide

Converting XLSX to XML turns a spreadsheet into a structured data file. XLSX is the modern Microsoft Excel spreadsheet format used for tables, formulas, workbooks, reporting, and data exchange. XML is a structured document and data format used for configuration files, feeds, exports, and machine-readable records. Below is exactly what changes when you convert XLSX to XML, what is preserved, and when XML is — or isn't — the right target format.

What changes when you convert XLSX to XML

• Both formats store data without lossy compression, so converting XLSX to XML preserves full quality.
• XML exports the cell values as a single plain table. Formulas, cell formatting, charts, and multiple sheets are not carried over — only the data itself.

About the XLSX format

XLSX is the default spreadsheet format for Microsoft Excel since 2007. Our converter handles complex spreadsheets with formulas, charts, and multiple sheets.

• Full name: Office Open XML Spreadsheet
• Developer: Microsoft
• Compression: ZIP
• Opens with: Excel, Google Sheets, LibreOffice Calc

Where XLSX is strong: live formulas, multiple sheets, and charts; cell formatting and data validation; the standard for spreadsheets.

Typical XLSX uses: financial models and reports, data analysis, multi-sheet workbooks.

About the XML format

XML (eXtensible Markup Language) is a versatile data format. Our converter can transform XML into other data formats and documents.

• Full name: eXtensible Markup Language
• Developer: W3C
• Compression: None
• Opens with: code editors, browsers, developer tools

Where XML is strong: structured, self-describing data; schema validation and namespaces; widely used for feeds and config.

Typical XML uses: configuration files, data feeds and exports, machine-readable records.

What XML keeps

• Full original quality — no lossy re-compression is applied.
• Text content remains editable in the output.
• XML adds: structured, self-describing data.

Things to watch out for

• If you rely on formulas or multiple sheets, keep the original XLSX workbook alongside the XML export.
• One XML limitation to keep in mind: verbose compared with JSON.

When to convert XLSX to XML

• Convert XLSX to XML for configuration files.
• Convert XLSX to XML for data feeds and exports.
• Convert XLSX to XML for machine-readable records.
• Choose XML when a website, browser, or upload form rejects your XLSX file.

XLSX vs XML — format comparison

A quick side-by-side of the structural differences between XLSX and XML, so you can confirm this is the right conversion for your file:

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