HEIC vs JPG — iPhone Photos vs Universal Standard

HEIC (High Efficiency Image Container) is the format iPhone uses by default for photos. It stores images using the HEVC compression codec, achieving roughly half the file size of an equivalent JPEG. The trade-off is compatibility.

Quality: HEIC is superior to JPEG at the same file size. A 4 MB HEIC photo retains more detail and fewer compression artefacts than a 4 MB JPEG. At equal quality, HEIC is ~50% smaller.

Compatibility:

• HEIC: Native on iOS, macOS (Preview, Photos), Android (Google Photos app). Not natively supported on Windows 10/11 (requires Microsoft Store HEIF extension, may cost ~$1). Web browsers do not display HEIC.
• JPEG: Universal — supported natively on every operating system, every browser, every social platform, every device since the 1990s.

Use HEIC when: your photo will stay within Apple ecosystem (iPhone → Mac → iCloud), storage space is limited, or you are shooting high volumes of photos.

Use JPEG when: sharing with Windows users, posting to social media (platforms transcode anyway), uploading to websites, or sharing with anyone who may struggle with HEIC.

Automatic conversion: iOS settings allow automatic HEIC → JPEG conversion when sharing. Settings → Camera → Formats → "Most Compatible" records in JPEG. Settings → Photos → Transfer to Mac or PC → "Automatic" converts on transfer.

Batch conversion: iMazing HEIC Converter (free) converts entire albums. Lightroom, macOS Preview, and Google Photos all export HEIC as JPEG on demand.