Convert xl to xls

Download and install the latest version of Filestar.
Right click on one or more Xl file(s) on your desktop and select Convert with Filestar.
Type convert to xls in the search box.
Press Convert.

Or let an AI agent do it: filestarcli -i file.xl -c "convert to xls" (how).

Let your AI agent convert XL to XLS

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine. It works on Windows only.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the XL files in my Downloads folder to XLS”

Or run it yourself:

filestarcli -i file.xl -c "convert to xls"

Runs on your computer, so your files stay on it. Works on Windows. 50 free conversions with the npm install, no account needed.

Can my AI agent convert XL to XLS?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.xl -c "convert to xls" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .xl and .xls?

Name: Excel Spreadsheet; Excel Spreadsheet
Extension: .xl; .xls
Format: Binary; Binary
Category: Spreadsheet; Spreadsheet
Developer: Microsoft; Microsoft
Description: Alternative extension used for Excel spreadsheet files.; An XLS file is a spreadsheet file created by Microsoft Excel or exported by another spreadsheet program, such as OpenOffice Calc or Apple Numbers. It contains one or more worksheets, which store and display data in a table format. XLS files may also store mathematical functions, charts, styles, and formatting.
MIME Type: application/vnd.ms-excel; application/vnd.ms-excel
Sample: sample.xls
Wikipedia: .xl on Wikipedia; .xls on Wikipedia

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