HEIC vs JPEG — What Format Does iPhone Actually Save Your Photos In?

If you've ever transferred iPhone photos to a PC or tried to open them somewhere unexpected, you may have noticed they're not always JPEG files. They might be .HEIC files — and that confuses a lot of people.

Here's everything you need to know.

What is HEIC?

HEIC stands for High Efficiency Image Container. It's Apple's preferred photo format since iOS 11, launched in 2017.

HEIC files are typically half the size of equivalent JPEG files while maintaining the same or better visual quality. That's a big deal when you're taking thousands of photos on a device with limited storage.

Why Does iPhone Use HEIC?

Apple switched to HEIC because:

Smaller files — takes up less iPhone and iCloud storage

Better quality — more detail preserved at the same file size

Modern standard — based on the HEIF standard used across the industry

The Problem With HEIC

HEIC is not universally supported. Windows struggles with it without installing additional codecs. Some websites, apps and older software don't accept HEIC files at all.

This is why many people discover their photos are in the wrong format when trying to use them outside Apple's ecosystem.

How to Check What Format Your iPhone Uses

Go to Settings → Camera → Formats:

High Efficiency — saves as HEIC (default on most iPhones)

Most Compatible — saves as JPEG

HEIC and Photo Backups

When you export your iCloud library using Migrate Moments, your photos are exported in their original format — HEIC stays HEIC, JPEG stays JPEG, RAW stays RAW. No conversion, no quality loss, no surprises.

If you need JPEG versions for compatibility, you can convert HEIC files using Preview on Mac by going to File → Export and choosing JPEG. For large batches, a dedicated converter app makes this faster.

The Bottom Line

HEIC is better than JPEG in almost every technical way — smaller, sharper and more efficient. The only downside is compatibility outside Apple's world. For most Mac users backing up to an external drive, HEIC is perfectly fine to keep as-is.

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