Why Are Some iPhone Photos HEIC and Some JPEG?

Q: Why are some iPhone photos HEIC and some JPEG?

Settings > Camera > Formats controls which format your camera saves. 'High Efficiency' saves HEIC; 'Most Compatible' saves JPEG. Photos received via iMessage, AirDrop from non-Apple devices, or downloaded from apps may appear as JPEG because those sources auto-convert for cross-platform compatibility. Your own camera roll is consistent — mixed formats usually come from received photos or a changed setting.

By Jack Smith — Updated March 8, 2026

Settings > Camera > Formats determines whether your camera shoots HEIC (High Efficiency) or JPEG (Most Compatible). The mixed formats in your library usually come from received photos, downloads, and screenshots — which are often JPEG — mixed with your own camera shots which are HEIC. A changed Camera setting in the past also causes a split-format library.

What Controls Your Camera's Format

Go to Settings > Camera > Formats. You'll see two options:

High Efficiency: Saves photos as HEIC and videos as HEVC. About 50% smaller file sizes at the same visual quality compared to JPEG. This is Apple's default since iOS 11 on compatible hardware.
Most Compatible: Saves photos as JPEG and videos as H.264. Larger file sizes but universally compatible with older software, Windows PCs, and non-Apple services.

If you've used your iPhone for years, you may have switched this setting at some point — or it may have reset after an iOS update or device restore. Photos taken under different settings coexist in your library, which explains the format mix. Learn more about the two formats in our HEIC glossary entry.

Why Received Photos Are Often JPEG

When someone sends you a photo via iMessage, they may be sending from an Android device (which shoots JPEG natively) or a conversion may happen in transit. Photos received from WhatsApp, Instagram, Facebook, email, or web downloads are almost always JPEG because those platforms compress and convert to JPEG for universal compatibility. Screenshots on iPhone save as PNG. Photos taken by old iPhones (iPhone 6 and earlier) before HEIC was introduced are JPEG. All of these end up in your library alongside your new HEIC shots.

How to Check a Photo's Format

Open a photo in the Photos app and swipe up to see its metadata panel. You'll see file format, size, and resolution listed. On iOS 16 and later, the format also appears in the info bar when you tap the (i) button while viewing a photo. If you transfer photos to a Mac, the file extension in Finder (.heic vs. .jpg) tells you the format immediately. You can also select all photos and export them to see the mix.

Does the Format Difference Matter?

For everyday use — scrolling your library, sharing to social media, or printing at standard sizes — HEIC and JPEG are visually indistinguishable. The differences that matter are file size (HEIC is smaller), editing flexibility (HEIC preserves more data for post-processing), and compatibility (JPEG works everywhere, HEIC may cause issues on older Windows software). If you share photos frequently with non-Apple users, consider switching to Most Compatible to avoid HEIC-to-JPEG conversion headaches. If storage is a concern, High Efficiency saves roughly 50% more space per photo. See the full breakdown: ProRAW vs. HEIC vs. JPEG on iPhone.

How to Convert Existing HEIC Photos to JPEG

You have several options. The simplest: go to Settings > Photos > Transfer to Mac or PC and choose Automatic — this converts HEIC to JPEG when you transfer photos via USB to a Windows PC or older Mac. For on-device conversion, see our dedicated page: How to Convert HEIC to JPEG on iPhone. For one-off sharing, simply sharing a photo via the Share Sheet to most apps converts it to JPEG automatically.

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