.heic File Extension

What kind of file is a .heic?

A .heic file is a High Efficiency Image File containing HEVC-coded image data. It normally uses the image/heic MIME type. HEIC is a codec-specific member of the broader HEIF container family, not another name for every HEIF file.¹

One HEIC can hold a primary photo plus thumbnails, alternate images, alpha or depth data, edits, and EXIF or XMP metadata. That makes the container useful for modern phone photography, but an ordinary image export may preserve only the rendered primary picture.

HEIC has no single fixed magic number. A typical file has an ISO Base Media File Format ftyp box near the beginning. Reliable identification requires parsing that box for a compatible brand such as heic, heix, heim, or heis; finding ftyp alone is not enough because MP4, AVIF, and other formats share the structure.¹

How do I open a .heic on my computer?

• On macOS, open HEIC images with Photos or Preview. Apple includes HEIF and HEVC support in macOS High Sierra 10.13 and later.²
• On Windows, Microsoft Photos can open them after the required HEIF and HEVC extensions are installed.³
• On Linux, use a current image application with HEIF and HEVC decoding support, such as GIMP with the appropriate codec libraries.
• On iPhone and iPad, Photos supports HEIF images on iOS 11 and later. Android support varies by device and app.

Browser support is less predictable than native app support. Safari 17 added HEIC display, but a JPEG, PNG, WebP, or AVIF fallback is safer for websites and unknown recipients.⁴

Poly support for .heic

Poly creates thumbnails, opens the primary image in its image viewer, reads supported dimensions and EXIF metadata, and enables visual similarity and color search. The Poly agent can reason about the rendered picture.

Words visible in an ordinary HEIC photo are not indexed as document text. Poly presents the primary rendered image rather than every auxiliary image, depth map, or container relationship. Review location and camera metadata before sharing a personal photo.

History of .heic

HEIF version 1 became an ISO standard in 2015 as ISO/IEC 23008-12. The container separates image organization and metadata from the codec used for the pixels.¹

Apple brought HEIF and HEVC into a mainstream camera workflow with iOS 11 and macOS High Sierra in 2017. The familiar .heic suffix became common for HEVC-coded photos captured by supported Apple devices. IANA registered the image/heic media type in 2018.¹²

Working with .heic and alternatives

Apple says HEIF and HEVC use less storage than JPEG and H.264 at the same visual quality, but there is no universal savings percentage.² Results depend on the image, encoder, bit depth, chroma sampling, and quality setting.

Keep the original when it contains HDR, edits, depth, a burst, or metadata that matters. Export to JPEG for broad compatibility or PNG for a lossless flattened copy. Converting a lossy HEIC to JPEG introduces another lossy encoding step, and no conversion can recover detail already discarded.