What Is HEIC? Apple's Photo Format, Explained
Updated August 27, 2026
If you've plugged an iPhone into a Windows PC and found photos that won't open, you've met HEIC. Here's what the format is, why Apple chose it, and your options for dealing with it.
The short version
HEIC is the file format iPhones have used for photos since iOS 11 in 2017. It stores a photo in roughly half the space of a JPG at similar quality. The trade-off: outside Apple's ecosystem, support is patchy — which is why the format mostly gets noticed when something refuses to open it.
What's actually inside a HEIC file
HEIC is a HEIF container (High Efficiency Image File format) holding an image compressed with HEVC — the same compression technology used for modern 4K video. Applying a video codec's intelligence to still photos is what buys the ~50% size saving over JPG. The container can also hold bursts, Live Photo stills, and depth data, which is why Apple picked it as the iPhone's native format.
Why it won't open everywhere
HEVC decoding was patent-encumbered and computationally heavier than JPG decoding, so support outside Apple lagged for years. Windows 10/11 can need codec extensions from the Microsoft Store; many Android apps, older programs, and upload forms simply reject the files. JPG, by contrast, has been universal for three decades.
Your three options
- Convert when needed — keep shooting HEIC for the storage savings, and run photos through a HEIC to JPG converter when they need to leave the Apple world. (Ours converts in your browser; photos are never uploaded.)
- Make the iPhone shoot JPG — Settings → Camera → Formats → Most Compatible. Photos take roughly twice the storage, but open anywhere forever.
- Add HEIC support to Windows — the HEIF Image Extensions (plus HEVC Video Extensions) from the Microsoft Store teach Windows to open the files directly.
Which should you pick?
If you rarely move photos off your iPhone, keep HEIC and convert occasionally — the storage savings are real. If your photos constantly flow to Windows PCs, Android users, or upload forms, switching the camera to Most Compatible removes the friction permanently. The deeper comparison is in HEIC vs JPG.