Method 1. CopyTrans
CopyTrans HEIC for Windows is a useful tool that allows the opening and viewing of HEIC images and converting them to JPG.
CopyTrans HEIC for Windows <<< To download on your personal device
CopyTrans is also available in Software Center for UIU devices
There's no interface; double-click any HEIC image, and you will be asked which app to open it with. Simple! If you have a HEIF file, rename the file extension to HEIC.
To convert HEIF to JPEG
Right-click on any image
Select Convert to JPEG with CopyTrans.
Method 2. Online Convertor
If you'd rather not download an app and only need to open a HEIC or HEIC image occasionally, you can convert images online at heictojpg.com.
Select the files that need to convert
Once the image process has been completed, click on DOWNLOAD JPEG.