Convert Compact Pro Archive to tar.7z

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Cpt file(s) on your desktop and select Convert with Filestar.

  3. Type convert to tar.7z in the search box.

  4. Press Convert.

  5. Or let an AI agent do it: filestarcli -i file.cpt -c "convert to tar.7z" (how).

Let your AI agent convert Compact Pro Archive to TAR.7Z

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 Compact Pro Archive files in my Downloads folder to TAR.7Z”

Or run it yourself:

filestarcli -i file.cpt -c "convert to tar.7z"

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 Compact Pro Archive to TAR.7Z?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.cpt -c "convert to tar.7z" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between Compact Pro Archive and .tar.7z?

Extension
.cpt
.tar.7z
Format
Binary
Binary
Category
Compressed
Compressed
Developer
Bill Goodman
Igor Pavlov
Description
Compact Pro Archive (.cpt) is a compressed archive format used on classic Mac OS, created by the Compact Pro compression utility. It bundles multiple Macintosh files—including resource forks—into a single compressed archive, and served as a popular alternative to StuffIt in the early 1990s.
This format works based on the LZMA principle compression algorithm. It was originally used in 7-Zip archives. tar.7z archives were created for storing info about file owners and for ease of use in Unix systems, based on a TAR archiving tool.
MIME Type
application/mac-compactpro
application/x-7z-compressed

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