When an iPhone HEIC photo will not open

iPhones save photos as HEIC by default. It is roughly half the size of JPG at the same quality, but most web browsers cannot open it. That applies to Chrome, Edge, and Firefox, which is where nearly every web-based editor runs. Recent Safari versions sometimes can, but it varies by tool.

What HEIC is and why it exists

HEIC applies video compression (HEVC) to still photos. It became the iPhone default with iOS 11 in 2017. It stores the same photo at about half the size of JPG with better quality, and it can hold several frames in one file, which is how Live Photos work. Between Apple devices it is seamless.

The trouble starts outside that circle. Windows, Android, and web browsers often cannot open it without an extra install or a conversion. If a photo is going to be uploaded somewhere or sent to someone, JPG is still the safe format.

Stopping it happening again

• Open Settings on the iPhone.
• Go to Camera.
• Tap Formats.
• Choose Most Compatible instead of High Efficiency.

Every photo taken after that saves as JPG. Files get somewhat larger, and they work everywhere. Photos already on the phone stay HEIC, so those need one of the methods below.

Photos you already took

• Simplest: share the photo to yourself over mail or a messaging app. Most convert to JPG on the way.
• Copying to the Files app on the iPhone also converts. Pick the photo, then Share and Save to Files.
• On a Mac, open it in Preview and use File then Export to pick JPEG.
• On Windows, install the HEIC extension for the Photos app, then use Save as and choose JPG.
• For a whole batch, go to Settings, Photos, Transfer to Mac or PC and choose Automatic. Photos convert to JPG when copied over a cable.

Does converting cost quality?

Going from HEIC to JPG is one more pass of lossy compression. But it is one pass, and the quality the iPhone uses for it is high enough that the difference is hard to see. File size typically grows 1.5 to 2 times. As long as the converted JPG is not re-saved repeatedly, there is no practical loss.

A Live Photo becomes a single still when converted. If the motion matters, keep the HEIC original or save it out as a video separately.