View and work with HEIF/.heic files in Illustrator on Windows by downloading and installing HEIF and HEVC codecs from the Microsoft Store.
When opening HEIF/.heic files into Illustrator, you may see one of the following messages:
Note: Canon HIF / HEIC Files are not supported.
To successfully import HEIF/.heic files, download, and install both of the HEIF and HEVC Extensions directly from Microsoft.
Restart Illustrator and try importing your HEIF/.heic file.