Use macOS Preview
Open the HEIC file in Preview
File menu → Export…
Set Format to JPEG
Select quality (if shown)
Save
Use Windows 10/11 Photos (if available)
Right-click the HEIC file → Open with → Photos
If prompted, choose to convert/save as JPEG
Save as JPEG
Use Windows HEIF Image Extensions (if needed)
Install “HEIF Image Extensions” from Microsoft Store
Open the HEIC file in Photos
Save/export as JPEG (if offered)
Use iPhone/iPad automatic conversion
Settings → Camera → Formats
Select Most Compatible (converts to JPEG on capture)
Use an online converter
Open a HEIC-to-JPG converter website
Upload the HEIC file
Choose JPG as output
Download the converted JPG
Use command line (macOS/Linux) with ImageMagick
Install ImageMagick
Run: `magick input.heic output.jpg`
Use command line (Windows) with ImageMagick
Install ImageMagick
Run: `magick input.heic output.jpg`
Use command line (cross-platform) with ffmpeg
Run: `ffmpeg -i input.heic output.jpg`
Use a dedicated app
Install a HEIC-to-JPG converter app from the Microsoft Store/App Store/Google Play
Add the HEIC files
Convert and save as JPG