Download and install the latest version of Filestar.
Right click on one or more Ico file(s) on your desktop and select Convert with Filestar.
Type drop shadow filter in the search box.
Press Run.
Or let an AI agent do it: filestarcli -i photo.ico -c "drop shadow filter" (how).
Let your AI agent drop shadow ICO filter
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:
“Use Filestar to drop shadow ICO filter in my Downloads folder”
Or run it yourself:
filestarcli -i photo.ico -c "drop shadow filter"
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 drop shadow ICO filter?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.ico -c "drop shadow filter" on your computer, so your files stay on it.
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.
