Download and install the latest version of Filestar.
Right click on one or more 3fr file(s) on your desktop and select Convert with Filestar.
Type convert to jbig in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.3fr -c "convert to jbig" (how).
Documents - File Explorer─☐✕
This PC › Documents
Home
Desktop
Downloads
Documents
Pictures
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.3frContract.3fr
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert 3FR to JBIG
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 3FR files in my Downloads folder to JBIG”
Or run it yourself:
filestarcli -i file.3fr -c "convert to jbig"
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 3FR to JBIG?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.3fr -c "convert to jbig" on your computer, so your files stay on it.
Digital photo captured by a Hasselblad digital camera; saves the photo in a RAW format as captured directly by the digital camera's CCD; used for saving photos natively before applying touch-ups, such as white balance or color corrections.
JBIG is a lossless compression file format that was created for the fax machine; it can be used by other image file formats. The files created by JBIG format are smaller compared to G3 and G4 file formats.