If your iPhone photos end in .heic, you are not alone - every iPhone since iOS 11 has shot them by default. Here is what that means and what to do about it.
HEIC: efficient, but picky
HEIC stores images at roughly half the size of JPG with no visible quality loss. The catch: not every app, printer, or website reads it.
The simplest fix
Convert HEIC to JPG in your browser. Drag, convert, download - three steps, no software, no upload.
Try the HEIC to JPG converter
Free, no sign-up, no upload - up to 15 images per batch.