HEIC to JPG on Mac
Preview can export one picture: File, Export, JPEG. For a folder of iPhone photos, drop them all on this page instead. Safari and Chrome on macOS both work.
The JPG is a new file. Your original HEIC in Photos is unchanged. Need a smaller upload for email? Lower the quality slider, or start from the HEIC to JPG homepage.
Drop HEIC files
Batch convert without Preview.