Download and install the latest version of Filestar.
Right click on one or more Sit file(s) on your desktop and select Convert with Filestar.
Type convert to zip in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.sit -c "convert to zip" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
Music
.sitContract.sit
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
ConvertMergeCompressExtractMoveZip
Let your AI agent convert SIT to ZIP
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 SIT files in my Downloads folder to ZIP”
Or run it yourself:
filestarcli -i file.sit -c "convert to zip"
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 SIT to ZIP?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.sit -c "convert to zip" on your computer, so your files stay on it.
StuffIt Archive (.sit) is a compressed archive format originally developed for the classic Mac OS. It bundles multiple files into a single archive while compressing them and preserving Mac-specific data such as resource forks. It was long the standard way to distribute and store files on the Macintosh platform.
A ZIP file is an archive that contains one or more files compressed or "zipped" using Zip compression. It stores files separately from each other allowing the files to be compressed using different methods and extracted without compressing or decompressing the entire archive.
