Why HEIC files won't open

You send a photo from your iPhone. The person on the other end says it will not open. The file is a HEIC, and this happens thousands of times a day.

What HEIC actually is

HEIC is a container based on HEIF, the High Efficiency Image File Format, storing images compressed with HEVC — the same codec as H.265 video. Apple adopted it as the iPhone default with iOS 11 in 2017, for a good reason: HEIC files are roughly half the size of an equivalent JPEG with no visible quality difference.

It also does things JPEG cannot: 16-bit colour depth instead of 8, transparency, and multiple images in one file, which is how Live Photos and burst sequences are stored.

So why does nothing open it?

Patents. HEVC is covered by a large and famously tangled set of patent pools, and using the codec means paying licence fees. JPEG, by comparison, has been effectively free for decades.

That single fact explains almost all the compatibility problems. Microsoft ships Windows without an HEVC codec and charges for one in the Store. Open-source projects were slow to add support because the licensing is unclear for redistribution. Web browsers never added native HEIC decoding at all.

The result is a format that works flawlessly inside Apple's ecosystem and unpredictably outside it.

Three fixes

1. Stop your iPhone producing HEIC

Settings › Camera › Formats › Most Compatible. Your phone shoots JPEG from then on. Photos take about twice the storage, and you lose the extra colour depth, but nothing you send will ever bounce again.

2. Convert when transferring

Settings › Photos › Transfer to Mac or PC › Automatic converts HEIC to JPEG as it copies. Your library stays efficient and what leaves the phone is universally readable. This is the option most people should pick.

3. Convert the files you already have

For photos already sitting in HEIC, convert them to JPG. Invo does this in your browser without uploading anything, which matters for personal photographs.

A note on AirDrop and messaging

AirDrop between Apple devices sends the original HEIC. WhatsApp, Messenger and most social apps convert to JPEG automatically. Email attaches whatever the Photos app hands over, which is usually HEIC — and email is where this problem most often surfaces.

Is HEIC worth keeping?

If you live inside Apple's ecosystem, yes. Half the storage for the same quality is a real benefit, and everything you own reads it.

If you regularly send photos to Windows users, upload to older web forms, or work with people on mixed platforms, the storage saving is not worth the friction. Switch to Most Compatible and forget about it.