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 tgz in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.sit -c "convert to tgz" (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 TGZ
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine. It works on macOS only.
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 TGZ”
Or run it yourself:
filestarcli -i file.sit -c "convert to tgz"
Runs on your computer, so your files stay on it. Works on macOS. 50 free conversions with the npm install, no account needed.
Can my AI agent convert SIT to TGZ?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.sit -c "convert to tgz" 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.
Unix .TAR file archive compressed with Gnu Zip (.GZIP) compression; uses a TAR archive to bundle the files together and Gzip compression to reduce the file size; commonly used on Unix and Linux systems; originally created as the shorthand version of the compound extension .TAR.GZ.
