What Is HEIC Format? iPhone Photos Explained

If you have ever transferred iPhone photos to a Windows PC and found files with a .heic extension that nothing can open, you have encountered HEIC. Here is a plain-English explanation of what it is, why Apple uses it, and how to work with it.

HEIC: High Efficiency Image Container

HEIC stands for High Efficiency Image Container. It is Apple's implementation of the HEIF standard (High Efficiency Image Format), developed by MPEG — the same organisation behind MP4 video. Apple started using HEIC as the default iPhone camera format with iOS 11 in 2017.

Why Apple Uses HEIC Instead of JPG

• HEIC achieves roughly 50% smaller file sizes than JPG at equivalent visual quality. A 4MB JPG photo can be stored as a 2MB HEIC with no visible quality difference. HEIC also supports features JPG does not:
• Live Photos (stores the video component)
• HDR image data
• Depth maps (Portrait Mode)
• Multi-frame images (burst shots stored in one file)

The Problem: Poor Compatibility

• HEIC is not widely supported outside Apple devices:
• Windows: Cannot open HEIC without installing the Microsoft HEIF Image Extensions
• Android: Cannot open HEIC natively in most gallery apps
• Web upload forms: Most websites do not accept HEIC files
• Email clients: Non-Apple mail clients may not display HEIC inline
• Older software: Photoshop, GIMP, and most apps require a plugin or update
• Convert HEIC to JPG for universal compatibility.

How to Convert HEIC to JPG

1. Open the HEIC to JPG converter 2. Select your .heic files 3. Download as JPG — runs entirely in your browser Batch conversion is supported. No account needed.

How to Prevent iPhone from Using HEIC

Go to Settings → Camera → Formats → Most Compatible. Your iPhone will now save photos as JPG. You will use slightly more storage, but photos will be compatible with all devices and apps.