Download and install the latest version of Filestar.
Right click on one or more Mp1 file(s) on your desktop and select Convert with Filestar.
Type convert to m4r in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.mp1 -c "convert to m4r" (how).
Documents - File Explorer─☐✕
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.mp1Contract.mp1
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
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Drop files here to get started
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Let your AI agent convert MP1 to M4R
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 MP1 files in my Downloads folder to M4R”
Or run it yourself:
filestarcli -i file.mp1 -c "convert to m4r"
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 MP1 to M4R?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.mp1 -c "convert to m4r" on your computer, so your files stay on it.
MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard. It is a deliberately simplified version of MPEG-1 Audio Layer II (MP2), created for applications where lower compression efficiency could be tolerated in return for a less complex algorithm that could be executed with simpler hardware requirements. While supported by most media players, the codec is considered largely obsolete, and replaced by MP2 or MP3.
M4R is an iTunes ringtone file that stores mono channel audio. They are identical to the M4A format files only that they are correctly used for ringtones.
