Download and install the latest version of Filestar.
Right click on one or more Gn file(s) on your desktop and select Convert with Filestar.
Type convert to heif in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i photo.gn -c "convert to heif" (how).
Documents - File Explorer─☐✕
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.gnContract.gn
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert GN to HEIF
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 GN files in my Downloads folder to HEIF”
Or run it yourself:
filestarcli -i photo.gn -c "convert to heif"
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 GN to HEIF?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.gn -c "convert to heif" on your computer, so your files stay on it.
The GN file type, associated with Apollo HDRU (High Dynamic Range Utility), is a proprietary format used for storing and processing high dynamic range images. These files are specifically designed to retain a wide range of luminosity levels, allowing for more detailed and realistic representations of scenes with significant contrasts in brightness. The Apollo HDRU software leverages the GN format to enable advanced editing, tone mapping, and rendering capabilities that enhance the visual quality of images without losing detail in both shadow and light areas. This makes GN files particularly valuable for professional photographers, graphic designers, and any visual media creators seeking to achieve the highest quality in digital imaging.
Based on HEVC (High-Efficiency Video Coding), the HEIF format is an image file container with one or multiple images and is the default image format for Apple Live Photos. It replaced the JPEG format as it's smaller in size and has lossless compression ensuring high-quality photos.
