What Is HEIC Format?
HEIC is the photo format your iPhone has saved to by default since iOS 11 in 2017. If a photo transferred from an iPhone has ever refused to open on a Windows PC or an older app, HEIC's compatibility gap is why. Here is what HEIC actually is, why Apple uses it, and what to do about it.
HEIC vs HEIF - What's the Difference?
HEIF (High Efficiency Image File Format) is the underlying container standard, developed by the Moving Picture Experts Group. HEIC is Apple's specific implementation of it, using HEVC (H.265) video compression for still photos.
The .heic extension is Apple's naming choice; some non-Apple devices save the same kind of file with a .heif extension instead. For everyday purposes - including conversion - the two behave identically. When people say "HEIC file," they almost always mean either one.
Why Did Apple Switch From JPEG to HEIC?
Two reasons: smaller files, and better quality at that smaller size. A photo that would be roughly 5MB as a JPEG typically comes in at 2-3MB as HEIC while storing the same visual information. As iPhone camera resolution kept climbing every year, HEIC let Apple raise photo quality without doubling storage use at the same pace.
The technical reason it works: HEIC compresses with HEVC (H.265), the same codec that powers 4K video streaming. H.265 analyzes larger blocks of an image and predicts redundant data far more efficiently than JPEG's much older DCT-based compression.
What HEIC Can Do That JPEG Can't
- 16-bit ColorFar smoother gradients than JPEG's 8-bit ceiling, avoiding banding in skies and sunsets.
- Non-Destructive EditsEdits made in iOS Photos are stored as instructions layered on top, not baked into the original pixels.
- TransparencySupports an alpha channel, which standard JPEG does not.
- Multiple Images, One FileUsed to power Live Photos, which bundle several frames together.
- Depth MapsPortrait mode depth information can be stored alongside the main image.
Where HEIC Works - and Where It Doesn't
| Platform / App | HEIC Support |
|---|---|
| iPhone, iPad, Mac (High Sierra+) | Native |
| WhatsApp, iMessage, AirDrop | Auto-converts when needed |
| Google Photos | Converts on upload |
| Photoshop, Lightroom, Affinity Photo (current) | Supported |
| Windows 10/11 (default) | Needs the free HEIF Image Extensions codec |
| Software last updated before 2019 | Likely no support |
| Many web forms, CRMs, upload widgets | Frequently rejected |
| Android (older builds) | Doesn't display it natively |
How to Tell If a File Is HEIC
On an iPhone you won't see file extensions at all - photos are just "photos," and the issue only surfaces once you move them to a computer. On a Mac, right-click a photo and choose "Get Info" - the file kind will read "HEIF image." On Windows, look at the filename if extensions are visible, or right-click and open Properties.
Have a HEIC file that needs to open anywhere?
Convert it to JPG in your browser - free, no account, works on every device.
Convert HEIC to JPG Free →How to Stop Your iPhone From Shooting HEIC
If you'd rather avoid the format entirely:
- 1Open Settings
- 2Scroll to Camera
- 3Tap Formats
- 4Choose "Most Compatible" instead of "High Efficiency"
New photos will save as JPEG from that point forward; existing HEIC photos in your library stay as they are. The downside is storage - JPEG runs roughly double the file size of the equivalent HEIC photo, which matters on a smaller-capacity iPhone.
Most people find a better middle ground: leave the iPhone on HEIC for the quality and storage benefit, and convert individual files to JPEG only when they specifically need to work outside Apple's ecosystem.
Frequently Asked Questions
Is HEIC the same as HEIF?
Practically, yes. HEIF is the broader container standard; HEIC is Apple's specific implementation using HEVC compression. They behave the same for viewing and converting.
Why does my HEIC photo look blank on Windows?
Windows does not include HEIC decoding by default. Install the free HEIF Image Extensions from the Microsoft Store, or convert the file to JPG.
Is HEIC smaller than JPEG?
Yes, typically 40-50% smaller at a comparable visual quality, which is why Apple made it the default format.
Can I batch convert many HEIC files at once?
Yes - a browser-based batch converter handles multiple files in one go without installing anything.
Will switching my iPhone off HEIC affect old photos?
No. The camera format setting only changes how new photos are saved - your existing HEIC library is untouched.