What it does
icoutils extracts and converts Windows icon and cursor resources, with programs designed for POSIX systems such as Linux.
An ICO can contain several images, so conversion is more than changing a filename. icotool can split those images into PNGs or create an icon/cursor file from PNG inputs. wrestool handles the different task of extracting embedded resources from executable and DLL files.
For a legacy application handoff, inspect the existing sizes and color depths before recreating the package. The tools are command-line programs designed for POSIX environments, even though their output is Windows artwork. They do not provide a drawing canvas or replace the need for licensed source images.
Strengths
- The suite handles multi-image icon and cursor containers.
- Separate tools cover conversion and embedded-resource extraction.
Watch out for
- The workflow is command-line and targets POSIX environments.
Best for
- Developers maintaining Windows icon resources from Linux
Sources
- icoutils home (Oct 25, 2026)