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 7z in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.sit -c "convert to 7z" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
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.sitContract.sit
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert SIT to 7Z
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 7Z”
Or run it yourself:
filestarcli -i file.sit -c "convert to 7z"
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 7Z?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.sit -c "convert to 7z" 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 7Z file is a type of compressed archive that uses the open-source LZMA compression algorithm to reduce the size of the file. This type of file is often used to store multiple directories and files in a single, compressed package. 7Z files can also include strong AES-256 encryption for added security. They are commonly created using the 7-Zip utility developed by Igor Pavlov.
