Download and install the latest version of Filestar.
Right click on one or more Wk1 file(s) on your desktop and select Convert with Filestar.
Type convert to tab in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.wk1 -c "convert to tab" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.wk1Contract.wk1
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert WK1 to TAB
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 WK1 files in my Downloads folder to TAB”
Or run it yourself:
filestarcli -i file.wk1 -c "convert to tab"
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 WK1 to TAB?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.wk1 -c "convert to tab" on your computer, so your files stay on it.
Lotus Worksheet (wk1) is a file type used by the Lotus 1-2-3 spreadsheet application. It is a binary file format used to store worksheets, which can contain numerical and textual data, as well as formulas, charts, and images. It is now considered an obsolete file type and is replaced by the newer xlsx format.
A tab-separated values (TSV) file is a simple text format for storing data in a tabular structure, e.g., database table or spreadsheet data, and a way of exchanging information between databases.
