Convert g4 to jbg

Download and install the latest version of Filestar.
Right click on one or more G4 file(s) on your desktop and select Convert with Filestar.
Type convert to jbg in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.g4 -c "convert to jbg" (how).

Let your AI agent convert G4 to JBG

Claude Code, Codex, Cursor and other agents can do this with Filestar. This skill runs in Filestar's cloud and needs a paid Filestar plan.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Or add it in one click:

Claude Code:

claude mcp add filestar -- npx -y [email protected] mcp

Then ask your agent:

“Convert the G4 files in my Downloads folder to JBG”

Or run it yourself:

filestarcli -i file.g4 -c "convert to jbg"

Runs in Filestar's cloud and needs a Filestar plan.

Can my AI agent convert G4 to JBG?

Yes, with a paid Filestar plan: this skill runs in Filestar's cloud. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.g4 -c "convert to jbg".

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .g4 and .jbg?

Name: Group 4 FAX; Image JBIG 1-bit Raster
Extension: .g4; .jbg
Format: Binary; Binary
Category: Fax; Raster Image
Developer: Computer Fax Systems (CFS); Joint Bi-level Image Experts Group (JBIG)
Description: Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.; Created by JBIG (Joint Bi-level Image Experts Group), JBG is a lossless file format that contains both colored and monochrome images. Commonly used to compress fax images, and it has better compression than G3 and G4 compression codecs.
MIME Type: image/g4fax; image/jbig
Wikipedia: .jbg on Wikipedia

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