How to Convert HEIC to JPG on Windows, Mac and Online (and Why iPhones Save HEIC)

HEIC stands for High Efficiency Image Container. It is Apple's use of the HEIF standard, paired with HEVC (also called H.265) compression — the same efficient math used in modern video. Since iOS 11, every iPhone from the 7 onward defaults to this format under a setting Apple labels High Efficiency.

Apple switched for a simple reason: storage. A HEIC file is usually about half the size of the equivalent JPG at comparable visual quality, so a 256 GB phone holds roughly twice as many photos. But the format also does things JPG cannot, which is why Apple leans on it.

In practice, that means your camera roll is smaller and technically higher quality than it would be as JPG — you just inherit a compatibility problem the instant you share a file.

The problem is almost never on your iPhone — it is on the other end. HEIC looks and works perfectly across Apple devices because they all decode it natively. Send it anywhere else and results get inconsistent.

Here is where people most often hit the wall, and the quickest way past each one. In most cases, converting to JPG before you send or upload is faster than asking the recipient to install anything.

If you just need the photo to open, you do not have to install codecs, buy anything, or wait for a recipient to update their software. A browser-based converter turns a HEIC into a standard JPG in a few seconds and works the same on Windows, Mac, Chromebook, or a phone.

The one thing worth checking with any online converter is where the file goes. Personal photos are exactly the kind of file you should not hand to an unknown server. A good tool decodes the HEIC entirely in your browser using WebAssembly, which means the image is processed on your own device and never uploaded — that is how the converter linked at the end of this article works.

The flow is the same everywhere:

Windows does not decode HEIC out of the box on most machines, which is why the Photos app shows an error or a black thumbnail. You have three routes, depending on whether you want to fix it once or fix it for good.

Option one is to teach Windows to read HEIC. In the Microsoft Store, install HEIF Image Extensions (free), and then the HEVC Video Extensions codec — Microsoft usually charges about a dollar for it, though a free variant labelled 'from Device Manufacturer' sometimes appears for certain PCs. With both installed, the Photos app can open a HEIC and you can use Save As to export a JPG.

Option two skips the install entirely: use a browser converter (below), which needs nothing added to Windows. Option three, if your photos already sync to OneDrive or Google Photos, is to open the photo in that service on the web and download it — both can hand you a JPG copy.

For a large folder of HEIC files, the built-in Photos app is clumsy for bulk export. A batch mode in an online converter, or a command-line tool like ImageMagick with HEIC support, will convert dozens of files at once far more comfortably.

macOS reads HEIC natively, so on a Mac the job is purely about exporting a JPG copy. You have several built-in options and never need a download.

Preview is the quickest for one or a few files: open the HEIC, choose File then Export, set the format to JPEG, pick a quality, and save. You can select multiple images in Preview's sidebar and export them together.

Finder is faster still if you are on macOS Monterey or later: select the HEIC files, right-click, choose Quick Actions, then Convert Image, and pick JPEG. It converts in place without opening any app.

For the whole library, the Photos app can export a batch (File, then Export, then Export Photos, with JPEG selected). And if you like the terminal, the built-in sips tool converts a file in one line:

Sometimes you want a JPG straight from the phone before you send it. The most reliable native method is the Shortcuts app: add the Convert Image action, point it at your selected photos, choose JPEG, and save the results back to your library or Files. Emailing a photo to yourself often produces a JPG too, though this behavior is not guaranteed across apps.

The better long-term fix is to change what the camera saves. Go to Settings, then Camera, then Formats, and choose Most Compatible. From that point on your iPhone shoots plain JPG (and H.264 video) instead of HEIC — no conversion needed ever again. High Efficiency is the setting that produces HEIC.

There is also a setting that controls what happens when you plug into a computer. Under Settings, then Photos, scroll to Transfer to Mac or PC: Automatic converts photos to a compatible JPG as they transfer over USB, while Keep Originals sends the untouched HEIC. If Windows keeps receiving HEIC files, switching this to Automatic often solves it at the source.

Usually not. Converting everything to JPG throws away the two things HEIC is good at: it roughly doubles the storage each photo uses, and it flattens 10-bit color and HDR down to 8-bit. JPG is also lossy, so re-encoding is a small, permanent quality trade even at high settings.

The sensible workflow is to keep your HEIC originals as the master copies and convert on demand — a JPG for the job application, a JPG to email your parents, a JPG for the print shop — while the phone keeps the efficient version.

If the converted JPG then needs to be small enough to email or upload under a size limit, run it through a compressor afterward rather than dropping the conversion quality, so you keep control over both size and clarity.