Download and install the latest version of Filestar.
Right click on one or more Cal file(s) on your desktop and select Convert with Filestar.
Type convert to rgba in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i photo.cal -c "convert to rgba" (how).
Documents - File Explorer─☐✕
This PC › Documents
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Desktop
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.calContract.cal
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert CAL to RGBA
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 CAL files in my Downloads folder to RGBA”
Or run it yourself:
filestarcli -i photo.cal -c "convert to rgba"
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 CAL to RGBA?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.cal -c "convert to rgba" on your computer, so your files stay on it.
The CALS raster file format, commonly known by the extension ".cal" or ".cals," is a bitmap file format designed primarily for the storage and interchange of digital images, especially in the field of computer-aided design (CAD) and engineering. Developed by the United States Department of Defense, it was intended to standardize the exchange of graphics data for electronic publishing of technical manuals. This format supports monochrome (1-bit) images and is distinguished by its efficient compression methods for reducing file sizes, facilitating easier storage and transmission. Despite its specific initial use case, the CALS raster format has found application in various industries for the archiving and sharing of high-resolution, scanned documents.
An RGBA file is a color bitmap image format created by Silicon Graphics (SGI). It is similar to the .RGB file as it supports color RGB channels with an alpha channel.
