Convert g3 to j2k

Download and install the latest version of Filestar.
Right click on one or more G3 file(s) on your desktop and select Convert with Filestar.
Type convert to j2k in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.g3 -c "convert to j2k" (how).

Let your AI agent convert G3 to J2K

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 G3 files in my Downloads folder to J2K”

Or run it yourself:

filestarcli -i file.g3 -c "convert to j2k"

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 G3 to J2K?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.g3 -c "convert to j2k" on your computer, so your files stay on it.

Using Filestar With AI Agents →

What is the difference between .g3 and .j2k?

Name: CCITT Group 3 Fax Image; JPEG 2000 Image
Extension: .g3; .j2k
Format: Binary; Binary
Category: Fax; Raster Image
Developer: CCITT; Joint Photographic Experts Group
Description: Fax image created in the CCITT Group 3 compressed format, which is used for digital transmission of fax data and supports 1 bit per pixel; can be viewed by programs such as GIMP and IrfanView.; Compressed bitmap image that uses wavelet compression instead of the DCT compression used by standard .JPEG images; supports 16-bit color, alpha transparency, and lossless compression.
MIME Type: image/g3fax; image/jp2
Sample: sample.g3; sample.j2k
Wikipedia: .g3 on Wikipedia; .j2k on Wikipedia

Convert G3 To J2k Today

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