What is a HEIC File? Why Your iPhone Photos Won't Open

Last updated: January 2026 · 4 min read

You just transferred photos from your iPhone to your Windows PC — and now none of them open. They're all .heic files and Windows has no idea what to do with them. This is one of the most common and most frustrating iPhone-on-Windows problems.

Here's what's happening and how to fix it in 60 seconds.

What is HEIC?

HEIC stands for High Efficiency Image Container. Apple made it the default photo format for iPhones starting with iOS 11 in 2017. The big advantage: HEIC photos are roughly half the file size of an equivalent JPG, with the same or better visual quality. That's why Apple switched — it saves storage space on your device.

The problem is compatibility. While Apple devices open HEIC natively, most of the rest of the world — Windows, Android, web browsers, email clients, most photo editing software — doesn't support HEIC by default.

Why won't HEIC files open on Windows?

Windows doesn't include a HEIC decoder in its standard installation. When you double-click a .heic file, Windows has no registered application that knows how to read it, so it either shows an error or asks you what app to open it with.

You have two options:

• Install Microsoft's HEIF Image Extensions — free from the Microsoft Store. This lets Windows Photo Viewer open HEIC files natively. Works on Windows 10 and 11.
• Convert the files to JPG — universally compatible format that opens everywhere. This is faster if you just need to share, email, or edit a few photos.

Can I convert HEIC to JPG without uploading to a server?

Yes — and that's the option we recommend for any personal photos. Most online converters upload your photos to their servers to do the conversion, which means your personal images pass through a computer you don't control, even briefly. Some of those services have questionable privacy policies.

This tool runs the conversion entirely in your browser using WebAssembly. Your files never leave your device.

HEIC vs JPG — which should you keep?

If you're sharing, emailing, or uploading photos anywhere on the internet, convert to JPG. It's universally compatible and supported everywhere.

If you're storing photos on Apple devices (iPhone, iPad, Mac), HEIC is fine — you'll save storage space and quality is excellent.

For anything involving Windows, Android, or web publishing, JPG is the safe choice.

What about HEIF?

HEIF (High Efficiency Image Format) is the container standard. HEIC is the specific Apple implementation of HEIF. For practical purposes they're the same thing — .heic and .heif files can both be converted to JPG with this tool.