Download and install the latest version of Filestar.
Right click on one or more Rast file(s) on your desktop and select Convert with Filestar.
Type convert to ico in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i photo.rast -c "convert to ico" (how).
Documents - File Explorer─☐✕
This PC › Documents
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Desktop
Downloads
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Pictures
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.rastContract.rast
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert RAST to ICO
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 RAST files in my Downloads folder to ICO”
Or run it yourself:
filestarcli -i photo.rast -c "convert to ico"
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 RAST to ICO?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.rast -c "convert to ico" on your computer, so your files stay on it.
The Sun Rasterfile, identified by the extension .rast, is a bitmap image file format originally developed for use on SunOS by Sun Microsystems. It is designed to store color and monochromatic raster images, such as scanned photographs and digital artwork. The format supports various color depths, including 1, 8, 24, and 32 bits per pixel, allowing for a range of color representations from simple black and white to full true color images. Despite its origins on Sun systems, the format can be used on various platforms and is supported by a variety of image editing and viewing software.
An ICO file is an image format used to store icons for Windows programs, files, and folders. It contains two bitmaps: 1) the AND bitmap - the image mask (which determines what part of the icon is transparent) and 2) the XOR bitmap - contains the icon which is mapped onto the image mask. ICO files can be modified to create custom icons.
