FileGizmo glossary
HEIC
HEIC is the file format iPhones use to save photos by default. It stands for High Efficiency Image Container and stores a HEVC-compressed image that looks the same as a JPG at roughly half the file size. The tradeoff is that many websites, apps, and Windows tools cannot open it directly.
Why you keep running into HEIC
You email a photo from your iPhone and the person on a Windows machine cannot open it. You upload one to a government form and it gets rejected. The file is fine. The format is simply newer than the software asking for it.
HEIC is genuinely a better container than JPG on paper, but the web was built on JPG, and compatibility beats efficiency the moment you need to hand a file to someone else.
How to convert it without uploading
- Open the HEIC to JPG converter.
- Drop in one photo or a whole batch of them.
- Download standard JPG copies that open on any device.
The conversion runs on your device, so a folder of personal photos never gets sent to a server to be processed.
Frequently asked questions
Why do iPhones save photos as HEIC?
HEIC uses newer compression than JPG, so photos take about half the storage at similar quality. Apple made it the default to save space on the device and in iCloud without a visible drop in image quality.
Is HEIC better than JPG?
For storage and quality it is more efficient. For compatibility JPG still wins, since almost every app, browser, and printer accepts it. Convert to JPG when you need to share a photo somewhere that rejects HEIC.
Can I stop my iPhone taking HEIC photos?
Yes. In Settings, open Camera, then Formats, and choose Most Compatible. New photos will be saved as JPG. Existing HEIC files stay as they are until you convert them.