You email a photo from your iPhone and the recipient replies: “It won’t open.” The culprit is almost always HEIC, the format Apple uses by default. This guide explains what HEIC is, why it causes trouble, and how to convert it to a universal format like JPG in seconds.

What is HEIC?

HEIC (High Efficiency Image Container) is Apple’s implementation of the HEIF format. Since iOS 11, iPhones and iPads have saved photos as HEIC because it offers a real advantage: it stores images at roughly half the file size of JPG at the same quality, thanks to modern compression based on the HEVC video codec. It also supports useful extras like depth maps and Live Photos.

So on your Apple device, HEIC is great. The problem starts when the photo leaves that device.

Why HEIC photos won’t open elsewhere

HEIC support is still patchy outside the Apple ecosystem:

  • Many Windows PCs need an extra codec to view HEIC.
  • Lots of websites and upload forms reject it.
  • Some Android phones, email clients, and older software can’t display it.
  • Plenty of printing services won’t accept it.

JPG, by contrast, opens literally everywhere. That’s why converting is often the simplest fix.

How to convert HEIC to JPG

You don’t need to install anything or trust a website with your personal photos. Our format converter reads HEIC and re-encodes it as JPG, PNG, or WebP entirely in your browser — the image never leaves your device.

  1. Open the converter and select your HEIC file (or drag it in).
  2. Choose JPG as the output format (PNG if you need lossless or transparency).
  3. Set the quality — around 85–90 keeps it sharp while staying small.
  4. Download your JPG, ready to open and share anywhere.

JPG or PNG — which should you pick?

  • JPG: Best for photos. Small files, universal support. The right choice 95% of the time when converting from HEIC.
  • PNG: Lossless and supports transparency, but the files are much larger for photographs. Only pick it if you specifically need lossless quality or a transparent background.

If you’re unsure, our format guide walks through the trade-offs in detail.

Want to stop your iPhone making HEIC files?

You can switch your iPhone to capture in JPG instead:

  1. Open Settings → Camera → Formats.
  2. Choose Most Compatible.

Your camera will now save new photos as JPG. (Existing HEIC photos stay HEIC — convert those as needed.) The trade-off is larger files, so many people leave HEIC on and just convert when they need to share.

Will converting lose quality?

Converting HEIC to JPG involves a re-encode, so technically there’s a tiny quality change — but at a quality setting of 85–90 it’s invisible to the eye. For everyday sharing, printing, and uploading, a converted JPG looks identical to the original. If you want to archive your originals at maximum fidelity, keep the HEIC files and convert copies.

The bottom line

HEIC saves space on your iPhone but trips up everything else. When a photo “won’t open,” convert it to JPG for universal compatibility — and do it in your browser so your personal pictures never get uploaded to an unknown server. A quick format change turns an unopenable file into one that works everywhere.