Why Your iPhone Saves Photos as HEIC

Since iOS 11, every iPhone from the 7 onward has saved camera photos as HEIC instead of JPEG. The change is invisible until you try to open a photo on a Windows PC or upload it to a website that does not accept the format. Here is what HEIC is, why Apple made the switch, and when you still need to convert.

What HEIC actually is

HEIC is Apple's branding for HEIF, the High Efficiency Image File Format standardized by the Moving Picture Experts Group (MPEG) under ISO/IEC 23008-12. The container stores images compressed with HEVC, the same codec used for high-efficiency video. Unlike JPEG, which dates to 1992, HEIF was designed to support transparency, 16-bit color depth, and image sequences, which is how Apple builds Live Photos. The “C” in HEIC simply refers to the Apple-specific container variant.

Why Apple moved away from JPEG

Storage capacity. According to Apple Support, HEIF and HEVC “offer better compression than JPEG ... while preserving the same visual quality.” Independent tests consistently show HEIF files are roughly 40 to 50 percent smaller than JPEGs at equivalent visual quality. On a 128 GB iPhone, that translates to roughly twice as many photos for the same storage footprint. Apple made HEIC the default on iPhone 7 and later because the camera pipeline on those devices could encode it efficiently without slowing down burst shooting.

The compatibility cost

Smaller files come with a familiar problem: JPEG is supported by every operating system, browser, and printer driver built since the 1990s. HEIC is not.

Windows 10 and 11 can open HEIC only after installing a codec extension from the Microsoft Store. Slack, some WordPress installations, older email clients, and many web forms still reject HEIC uploads. When you AirDrop a photo to an older Mac or share via Messages to a non-Apple phone, iOS often transcodes the image to JPEG automatically. That conversion is invisible, but it re-encodes the image, which can strip some metadata and slightly shift color rendering.

When you still need JPG

You still need to convert HEIC to JPG in a few predictable situations:

• Uploading to a website, job portal, or social platform that blocks HEIC
• Sending photos to someone on Windows or older Android without a codec installed
• Editing in desktop software that predates HEIF support
• Archiving images for maximum long-term compatibility

The privacy problem with most converters

Most online HEIC converters ask you to upload your photo to a remote server first, wait in a queue, then download the result. That exposes your images to storage logs, potential data breaches, and retention policies you cannot control.

A safer approach is to convert HEIC to JPG directly in your browser. WebAssembly makes it possible to run the same libheif decoder locally on your device. The file never leaves your computer, and the conversion finishes in seconds.