Download and install the latest version of Filestar.
Right click on one or more Xml file(s) on your desktop and select Convert with Filestar.
Type convert to xlsx in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.xml -c "convert to xlsx" (how).
Let your AI agent convert Excel 2003 XML Spreadsheet to XLSX
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the Excel 2003 XML Spreadsheet files in my Downloads folder to XLSX”
Or run it yourself:
filestarcli -i file.xml -c "convert to xlsx"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent convert Excel 2003 XML Spreadsheet to XLSX?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.xml -c "convert to xlsx" on your computer, so your files stay on it.
An Excel 2003 XML spreadsheet is a Microsoft Excel workbook saved as a single XML file in the SpreadsheetML format of Excel 2002/2003. It holds the worksheets, cell values, formulas and styles.
An XLSX file is an Excel spreadsheet created by Microsoft Excel or another spreadsheet program, such as OpenOffice Calc or Apple Numbers. It stores data in worksheets, which contain cells arranged in a grid of rows and columns, and may also contain charts, mathematical functions, styles, and formatting. XLSX files are commonly used to store financial data and to create simple or complex mathematical models.
