You connect your iPhone to your computer, pull up your photos, and find a folder full of files ending in .heic. Then you try to open one on Windows and nothing happens. Or you try to upload one to a website and it won't accept it. If this sounds familiar, you're not alone — this is one of the most common file format frustrations there is.
Here's what's going on and what to do about it.
HEIC stands for High Efficiency Image Container. It's the file format Apple switched to as the default for iPhone photos starting with iOS 11 in 2017. The image compression technology inside it is called HEIF (High Efficiency Image Format), which is why you'll sometimes see these terms used interchangeably.
HEIC was developed by the Moving Picture Experts Group — the same organization behind MP3 and MP4 — and it's genuinely a better format than JPG in most measurable ways.
Storage. That's the main reason. iPhones take excellent photos, and excellent photos take up a lot of space. By switching to HEIC, Apple was able to cut the storage required for each photo roughly in half — without reducing the visible quality of the images.
When you're selling phones with a fixed amount of storage, being able to store twice as many photos in the same space is a meaningful selling point. HEIC also stores additional data that JPG doesn't support well, including multiple images in a single file (useful for Live Photos and burst shots), depth maps, and HDR information.
From Apple's perspective, HEIC is a strict improvement. The problem is that the rest of the world didn't switch at the same time.
HEIC support outside Apple's ecosystem is inconsistent. It's gotten better over the years, but there are still plenty of situations where you'll run into issues.
| Platform / App | HEIC Support | Notes |
|---|---|---|
| iPhone / iPad / Mac | Full | Native support across all Apple devices |
| Windows 10/11 | Partial | Requires a free codec from the Microsoft Store |
| Android | Varies | Newer Android versions support it; older ones don't |
| Web browsers | Limited | Safari yes; Chrome/Firefox support varies |
| Social media uploads | Often no | Most platforms expect JPG or PNG |
| Photoshop / Lightroom | Yes | Supported in recent versions |
| Older image editors | No | If it hasn't been updated since 2017, probably not |
The frustration is real. HEIC is technically superior to JPG, but "technically superior" doesn't help when you're trying to attach a photo to an email and the recipient can't open it.
Yes, actually. If you'd rather have your iPhone save photos as JPG from the start, you can change it in Settings. Go to Settings → Camera → Formats and choose Most Compatible instead of High Efficiency. Your photos will save as JPG going forward. You'll use more storage, but you'll avoid the compatibility headache entirely.
There's also a middle-ground option that most people don't know about. When you AirDrop a HEIC photo to a Mac, it stays as HEIC. But when you transfer photos to a Windows PC via USB cable, iOS can automatically convert them to JPG on the way out. This is controlled by Settings → Photos → Transfer to Mac or PC — set it to Automatic and iOS handles it for you.
If you already have HEIC files that need to be converted, there are a few ways to handle it:
Open the HEIC file in Preview, go to File → Export, and choose JPG from the format dropdown. For batch conversion, select multiple files in Finder, right-click, and choose Quick Actions → Convert Image.
Install the free HEIF Image Extensions codec from the Microsoft Store and Windows Photos will open HEIC files natively. For converting, you can use the Photos app's export function — though it's a bit buried. For batch conversion of many files, an online converter is faster.
The easiest option for most people, especially for converting multiple files at once. The one thing to watch for is privacy — most conversion sites upload your files to their servers. That's not a big deal for most vacation photos, but it's worth knowing.
Drop your .heic files in and download standard JPGs. Batch conversion supported. Your files never leave your browser — nothing is uploaded anywhere.
Open HEIC ConverterProbably not entirely, but it will continue to spread. HEIC is already the default for hundreds of millions of iPhones, and support across other platforms keeps improving. The bigger question is whether HEIC or WebP will become the dominant web image format going forward — both are superior to JPG in different ways, and both have substantial backing.
For now, the practical answer is: HEIC is great for storage on your iPhone, and JPG is still the universal format for everything else. When you need to share, upload, or edit HEIC photos outside Apple's ecosystem, convert them first. It takes seconds.