Download and install the latest version of Filestar.
Right click on one or more Stc file(s) on your desktop and select Convert with Filestar.
Type convert to xltm in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.stc -c "convert to xltm" (how).
Documents - File Explorer─☐✕
This PC › Documents
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Desktop
Downloads
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Pictures
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.stcContract.stc
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert STC to XLTM
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, macOS only.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the STC files in my Downloads folder to XLTM”
Or run it yourself:
filestarcli -i file.stc -c "convert to xltm"
Runs on your computer, so your files stay on it. Works on Windows and macOS. 50 free conversions with the npm install, no account needed.
Can my AI agent convert STC to XLTM?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.stc -c "convert to xltm" on your computer, so your files stay on it.
The stc file type is used with the StarOffice Calc spreadsheet application. It is a template file that contains preset formulas, data, formatting, and layout settings. It is used to quickly create spreadsheets with the same formatting, layout, and data.
Template file created by Microsoft Excel, a spreadsheet program; contains default settings and layout properties for a macro-enabled spreadsheet.