Download and install the latest version of Filestar.
Right click on one or more Xlk file(s) on your desktop and select Convert with Filestar.
Type convert to xhtml in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.xlk -c "convert to xhtml" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
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.xlkContract.xlk
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert XLK to XHTML
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.
“Convert the XLK files in my Downloads folder to XHTML”
Or run it yourself:
filestarcli -i file.xlk -c "convert to xhtml"
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 XLK to XHTML?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.xlk -c "convert to xhtml" on your computer, so your files stay on it.
XLK files are Microsoft Excel Backup Files, which are created as backup copies of Excel files (.XLS or .XLSX). They contain a copy of the excel file in its original state, and can help to restore a file if the original is lost, damaged or corrupted.
XHTML files are a type of markup language document used to create webpages. It is an XML-based version of HTML and is designed to meet the needs of Web developers. XHTML files have a .xhtml extension and can be viewed in any web browser.