HEIC (High Efficiency Image Container) is the default photo format used by iPhones since iOS 11 launched in 2017. It stores images at roughly half the file size of JPG with no visible loss of quality — but it doesn't open on Windows or Android without extra steps, which is where most of the frustration comes from.
Here's what HEIC is, why Apple chose it, and exactly how to deal with it.
HEIC stands for High Efficiency Image Container. The image compression technology inside it is called HEIF (High Efficiency Image Format), which is why you'll sometimes see these terms used interchangeably — HEIF is the standard, HEIC is Apple's implementation of it.
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.
Yes, but you need to install a free codec first. Search for "HEIF Image Extensions" in the Microsoft Store and install it — Windows Photos will then open HEIC files natively. Alternatively, convert the HEIC to JPG before you need it, which works on any device without installing anything.
Technically yes — HEIC files are about 50% smaller than JPG at equivalent quality, and support 16-bit color depth vs. 8-bit in standard JPG. The practical downside is compatibility: JPG opens everywhere, HEIC doesn't. Until HEIC support is universal, JPG is still the safer choice for anything you plan to share.
Go to Settings → Camera → Formats and tap Most Compatible. Future photos will save as JPG. You'll use more storage, but your photos will open on any device without conversion. Existing HEIC photos aren't affected — only new ones.
HEIF is the image format standard; HEIC is the container file format that Apple uses to store HEIF images. In practice the terms are used interchangeably. If you see either extension — .heic or .heif — it's the same type of file.
Slightly, because JPG is a lossy format. But at high quality settings (90%+), the difference is imperceptible. Converting a HEIC to JPG at high quality produces a file that looks identical to the original to any normal viewer. The main tradeoff is file size — the JPG will be larger than the HEIC.