An HEIC file contains one or more images saved in the High
Efficiency Image Format (HEIF), a file format most commonly
used to store photos on iOS devices. It contains an image or
sequence of images likely created by an iPhone or iPad's
Camera app, as well as metadata describing each image. HEIC
files are most commonly saved with the .heic extension but may
also be saved as .HEIF files.
HEIC to PNG is an online converter with unlimited conversion. You can convert any number of files.