iMyFone HEIC Converter - iMyFone HEIC converter can convert your iPhone's HEIC photos to JPEGs on your computer without...
iMazing HEIC Converter - iMazing HEIC converter is a free Mac and PC app which converts photos from HEIC to JPEG or PNG.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Heic File Converter - Free Software to Convert HEIC File to JPG / PNG / PDF
QuickLook - Bring macOS “Quick Look” feature to Windows.