Download and install the latest version of Filestar.
Right click on one or more Si 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.si -c "convert to xlsx" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.siContract.si
.pdfReport.pdf
.pngLogo.png
.docxNotes.docx
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert SI 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 SI files in my Downloads folder to XLSX”
Or run it yourself:
filestarcli -i file.si -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 SI to XLSX?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.si -c "convert to xlsx" on your computer, so your files stay on it.
An SIE import file (SIE 4I) holds vouchers from a subsystem such as invoicing or payroll, meant to be imported into Swedish accounting software. Fortnox, Visma and Bokio export and import this Swedish standard.
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.
