What is a HEIC file?

A file ending in .HEIC is a picture stored in the HEIF format (High Efficiency Image File Format) with the image compressed by HEVC, also called H.265. HEIF is the container, a structured box that can hold one or many images plus extra data; HEVC is the method that squeezes the pixels. Apple adopted it for the iPhone camera in iOS 11 (2017), and macOS High Sierra the same year. Today it is the default photo format on every iPhone, and some Android phones offer it as an option too.

• HEIF: the container standard, published by MPEG (ISO/IEC 23008-12). It defines how images, thumbnails and metadata are stored in one file.
• HEVC / H.265: the compression codec, originally designed for video. HEIF borrows its “intra” mode, which compresses a single frame.
• HEIC: the name for a HEIF file whose images use HEVC. That is what an iPhone writes, and the extension you see.
• .HEIF files exist too, and a HEIF can in principle use other codecs, for example AV1, which gives you the AVIF format.

So “HEIC” and “HEIF” are often used for the same thing in practice. For converting, they behave the same.

The main reason is size. HEVC compresses photos far better than the JPEG method from 1992, so a HEIC is typically about half the size of a JPG with the same visible quality. For a phone that takes thousands of photos and syncs them to the cloud, that halves storage and upload time.

It also does things JPG cannot:

• More colour depth. HEIC can store 10 bits per channel instead of 8, which keeps smoother gradients in skies and supports the wide colour and HDR look of newer iPhones.
• Several images in one file. Bursts, depth maps for Portrait mode, and HDR gain maps can live alongside the main picture.
• Non-destructive edits on Apple devices are easier to store with the original.

The container also supports transparency and image sequences, though iPhone photos rarely use those.

Works out of the box:

• iPhone, iPad and Mac: everywhere, including Photos, Preview, Finder and Safari.
• Most recent Android phones, in their own gallery apps.
• Many cloud photo services, which convert it for display.

Needs extra steps or fails:

• Windows 10 and 11: needs the HEIF Image Extensions and the HEVC codec from the Microsoft Store; without them you see blank icons.
• Websites and upload forms: many accept only JPG and PNG and reject HEIC outright.
• Browsers: Safari decodes HEIC; most other browsers do not display it in a page.
• Older photo editors, printers and photo kiosks: often JPG only.

That gap is why “HEIC to JPG” is one of the most searched conversions on the web.

• File size: HEIC about 1–2 MB for a 12 MP iPhone photo; the same photo as JPG at high quality is usually 1.5–2 times larger.
• Visible quality: at normal viewing, no difference when the JPG is saved at quality 85–90.
• Colour depth: HEIC up to 10-bit; JPG 8-bit. On a regular screen and for printing, 8-bit is fine.
• Transparency: HEIC supports it; JPG does not.
• Compatibility: JPG opens on everything made in the last 30 years; HEIC does not.

Converting HEIC to JPG therefore costs storage, not quality you can see. Expect the JPG to be bigger, not smaller, and do not worry about it.

A converter decodes the main image and saves it again in the new format. On KiteConvert, that means:

• The primary image is converted. Thumbnails, depth maps and the motion half of a Live Photo are not part of the result.
• HDR and 10-bit pictures become standard 8-bit images in sRGB colour, which every screen and printer handles.
• The rotation from the camera is applied, so the picture comes out the right way up.
• For JPG, the date taken and camera model are kept by default, and GPS location is removed unless you switch that off.
• A burst or sequence HEIC is converted from its main image, with a note.

Choose JPG to share or upload, PNG to edit further without adding more compression, or PDF to send several photos as one document.

Yes. On an iPhone, Settings › Camera › Formats › Most Compatible makes the camera save JPG. Photos then take about twice the space, and some high-frame-rate video modes need High Efficiency. The milder option is to keep HEIC on the phone and let the iPhone hand out JPGs when sharing or when copying to a PC, which it does automatically in most cases.

Inside Apple’s world it is already the standard and will stay. On the open web, the momentum has moved to AVIF (the same HEIF container with the royalty-free AV1 codec) and WEBP, which all major browsers support. HEVC licensing is the main reason HEIC never became a web format. So for the foreseeable future HEIC remains a great capture format and a poor exchange format, and converting it when you share will stay a normal step.