HEIC vs JPEG on iPhone

What HEIC actually is

HEIC stands for High Efficiency Image Container. It is a file format that wraps images encoded with HEVC (the same video codec as 4K video on iPhone). HEIF is the family name; HEIC is the specific Apple-flavoured variant.

The compression is roughly twice as efficient as JPEG. A 12 MP photo that would be ~4 MB as JPEG becomes ~2 MB as HEIC, with no visible loss. Over a thousand photos that adds up to gigabytes.

When iPhone uses each format

On any iPhone 7 or newer running iOS 11+, the camera defaults to HEIC. You can switch this in Settings → Camera → Formats:

• High Efficiency: HEIC for photos, HEVC for videos. Default.
• Most Compatible: JPEG for photos, H.264 for videos. Bigger files, but plays everywhere.

Apple is also clever about exports. If you AirDrop, share via iMessage, or upload to a non-Apple service, iOS may auto-convert HEIC to JPEG behind the scenes if it detects the destination would not handle HEIC. This is why most users never notice the format change.

Compatibility

Platform	HEIC support
macOS, iOS, iPadOS	Native since 2017.
Windows 10+	Supported with the HEIF Image Extensions from the Microsoft Store. Sometimes preinstalled.
Android	Most modern devices support HEIC viewing and capture.
Web browsers	Safari yes. Chrome and Firefox: limited, still mostly converted to JPEG before upload.
Older photo printers	Usually not. Convert to JPEG before printing.
Photoshop / Affinity / Lightroom	Yes, since 2019 or so.

When to switch back to JPEG

Stay on HEIC by default. Consider switching to JPEG (or just exporting JPEG copies on a per-photo basis) if:

• You upload often to a service that does not handle HEIC well.
• You share photos regularly with someone on an older Windows machine who has refused to install the HEIF extensions.
• You shoot for a photo competition or stock site that explicitly requires JPEG.
• You print at a local photo lab whose kiosk does not accept HEIC.

For everyone else, leaving the default alone saves serious storage with no real downside.

Converting HEIC to JPEG

Three easy ways:

• Share Sheet: open the photo, tap Share, scroll down to "Copy as JPEG" if available. Some apps offer "Save as JPEG" directly.
• Mail / AirDrop: iOS auto-converts when sending to a known-bad destination.
• Photos app on Mac: drag a HEIC out of Photos to Finder, hold Option, and macOS exports a JPEG copy.

You can also batch-convert with the Files app (long-press a HEIC and pick "Convert Image" in newer iOS versions) or with any modern image-conversion app.