Download and install the latest version of Filestar.
Right click on one or more M4b file(s) on your desktop and select Convert with Filestar.
Type edit metadata in the search box.
Press Run.
Or let an AI agent do it: filestarcli -i file.m4b -c "edit metadata" (how).
Let your AI agent edit M4B metadata
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:
“Use Filestar to edit M4B metadata in my Downloads folder”
Or run it yourself:
filestarcli -i file.m4b -c "edit metadata"
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 edit M4B metadata?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.m4b -c "edit metadata" on your computer, so your files stay on it.
It is an audiobook file compressed using .AAC algorithm based on MPEG-4 container format. It is similar to .M4A file but its denoted as an audiobook and supporting audio players can bookmark it.
