What Is HEIC and Why Won't It Open?

You moved photos from your iPhone to a PC, and the extension is .HEIC. Double-clicking does nothing, or a photo site refuses the upload. Nothing is broken; the file format is just unfamiliar to that software.

What is HEIC?

HEIC is HEVC (H.265) video compression packaged in a container called HEIF. Because it applies video compression technology to still photos, it is said to store the same quality in about half the space of JPG. Apple made it the default camera format starting with iOS 11 in 2017, largely to save storage on the iPhone.

A HEIC file can hold more than one photo. Extras such as the short video of a Live Photo, or the depth data of Portrait mode, can travel with it.

Why won't it open on Windows or the web?

The main reason is that HEVC technology carries patent royalties. Browser and operating system makers are reluctant to include it by default, so support is patchy.

• Apple devices (iPhone, iPad, Mac) open it natively.
• Windows 10 and 11 often need extensions from the Microsoft Store (HEIF Image Extensions and HEVC Video Extensions). One of them may be paid.
• Most web browsers can't display HEIC files directly. That is why shops, job sites and government upload forms often refuse HEIC.

Three ways to fix it

1. Convert photos you've already taken

Drop the HEIC file onto this site and choose JPG, and it is converted right in your browser. The file isn't sent to a server, so personal photos are safe to use. You can add many at once and download them as a ZIP.

Here is a measured example. A 1280×854 HEIC sample (701KB) became 417KB as a quality-90 JPG. That sample was already heavily compressed, so it shrank; in general HEIC tends to be smaller than a JPG of the same quality, so a high quality setting can make the file grow. Check the real size on the result screen.

2. Shoot JPG from now on

In the iPhone Settings app, open Camera, then Formats, and choose the more compatible option (Most Compatible). New photos are then saved as JPG. The label can differ slightly by iOS version. The trade-off is that the same photo takes up more storage. Photos you've already taken are not affected.

3. Turn on automatic conversion when transferring

At the bottom of the Photos section in Settings there is a Transfer to Mac or PC option. Choosing Automatic instead of Keep Originals converts photos to a compatible format as they are transferred over a cable. On the iCloud website you can also choose whether to download the original or a more compatible format.

JPG or PNG?

Unless you have a specific reason, JPG is recommended. Converting the same sample to PNG gives 2.2MB, more than five times the JPG (417KB). PNG only makes sense when you need a transparent background or want to avoid degradation across many edits. A closer comparison is on the PNG and JPG pages.

What you lose when converting

• The short video and depth data of Live Photos are not included; only the main photo remains.
• EXIF data such as shooting location (GPS) is removed by default on this site. That also keeps your location from being exposed when you post photos on resale sites or social networks.

Don't delete the original HEIC; keep it separately. If you need another format later, you can convert it again at any time.