If you've ever transferred photos from an iPhone to a Windows PC and found they won't open, you've run into HEIC. Since iOS 11, Apple's iPhones shoot photos in this format by default — and while it's great for saving storage, it causes headaches everywhere outside the Apple ecosystem.
This guide explains what HEIC is, why Apple chose it, where it works (and where it doesn't), and the simplest ways to open or convert HEIC files on any device.
What does HEIC stand for?
HEIC stands for High Efficiency Image Container. It's a file format that stores images using a compression method called HEVC (High Efficiency Video Coding, also known as H.265). A .heic file is essentially a container holding one or more images encoded with HEVC.
You'll also see the related term HEIF(High Efficiency Image Format) — HEIC is essentially Apple's variant of HEIF. In practice, when people say “HEIC,” they mean the iPhone photo format that ends in .heic.
Why does the iPhone use HEIC instead of JPG?
Apple switched to HEIC with iOS 11 (2017) for one main reason: it produces much smaller files than JPG at the same quality. A HEIC photo is typically about half the size of an equivalent JPG, which means more photos fit on your phone and in iCloud.
HEIC also supports features JPG doesn't: 16-bit color (vs JPG's 8-bit), transparency, and the ability to store multiple photos or a burst in a single file. For Apple, it was a clear win — smaller files, better quality, more capability.
The problem: HEIC on Windows and other devices
Here's the catch: while HEIC is great on Apple devices, Windows does not support it out of the box. If you copy HEIC photos from your iPhone to a Windows 10 or 11 PC, they often won't open in the Photos app, and many websites and apps reject them.
Android is in a similar boat — support varies by manufacturer and version. Most web platforms, email clients, and older software expect JPG or PNG, not HEIC.
How to open HEIC files on Windows
You have a few options:
- Install the HEIF and HEVC extensions from the Microsoft Store (the HEVC one costs a small fee unless your PC maker bundled it). After that, the Photos app can open HEIC files.
- Convert them to JPG. This is the most universally reliable fix, since JPG works everywhere. You can convert a single file in Paint, or batch convert HEIC to JPG in your browser without uploading anything.
- Make your iPhone shoot JPG instead: go to Settings → Camera → Formats and choose “Most Compatible”. New photos will be JPG.
HEIC vs JPG: which should you use?
For everyday shooting on your iPhone, HEIC is fine— it saves space and looks identical. The issue only arises when you need to share or use the photos outside Apple's world.
For sharing, uploading to forms, or sending to Windows users, JPG is the safer choicebecause it's universally supported. Converting HEIC to JPG removes the compatibility headache entirely.
The fastest way to convert HEIC to JPG
If you have a batch of HEIC photos on your Windows PC and need them as JPG, the quickest path is a browser-based converter that processes the files locally — no software install, no upload. Our HEIC to JPG converter does exactly this: drag in your HEIC files, convert, and download the results as a ZIP. Your photos never leave your device.
Summary
HEIC is Apple's efficient photo format — smaller and better than JPG, but poorly supported on Windows and other platforms. When you hit a compatibility wall, converting HEIC to JPG is the most reliable fix. Understanding this format saves you from the common “my iPhone photos won't open” frustration.