Apple introduced HEIC as the default photo format on iPhone in 2017, and most iPhone users have been dealing with compatibility confusion ever since. HEIC files are genuinely better in many ways — but they don't work everywhere. Here's the full comparison so you know exactly when to keep HEIC and when to convert.
What Is HEIC?
HEIC (High Efficiency Image Container) is a container format based on the HEIF (High Efficiency Image File Format) standard, developed by the Moving Picture Experts Group. It stores images compressed with the HEVC (H.265) codec — the same codec used for 4K video.
Apple began using HEIC by default on iOS 11 and macOS High Sierra. iPhones, iPads, and Macs now capture and store photos in HEIC unless you change the settings.
What Is JPEG/JPG?
JPEG (Joint Photographic Experts Group) has been the standard photo format since 1992. Nearly every camera, device, application, website, and service on earth supports JPEG. It uses the DCT (Discrete Cosine Transform) compression algorithm, which has been refined for three decades.
JPEG and JPG are the same format — .jpg and .jpeg are interchangeable file extensions.
Side-by-Side Comparison
| Feature | HEIC | JPG |
|---|---|---|
| File size | ~40–50% smaller | Larger |
| Image quality | Equal or better at same size | Good, widely tested |
| Transparency (alpha) | Yes | No |
| Multiple images | Yes (Live Photos, burst) | No (single frame only) |
| Bit depth | Up to 16-bit | 8-bit standard |
| HDR support | Yes | Limited |
| Browser support | Safari only (natively) | All browsers |
| OS support | macOS, iOS, Windows 11 (with codec) | Universal |
| Social media | Often auto-converted | Universal |
| Web hosting | Mostly unsupported | Fully supported |
| Email compatibility | Inconsistent | Universal |
The Key Trade-off: Size vs Compatibility
HEIC's primary advantage is file size. At the same visual quality, HEIC files are roughly half the size of equivalent JPEGs. For a phone with 256 GB of storage and 50 million pixels per photo, that difference matters enormously.
But HEIC's compatibility is still limited:
- Windows requires installing a codec from the Microsoft Store
- Android doesn't natively support HEIC
- Most web browsers only support HEIC in Safari
- Many photo editing apps don't support HEIC yet
- Social networks (Instagram, Twitter, Facebook) accept HEIC but convert it to JPEG internally
When to Keep HEIC
Storing photos on Apple devices. If photos stay on your iPhone, iPad, or Mac, HEIC is strictly better — smaller files, better quality, and support for Live Photos and sequences.
Sharing between Apple users. AirDrop and iMessage handle HEIC natively. Apple-to-Apple sharing works seamlessly.
Long-term archiving on Apple ecosystem. If you're archiving photos in iCloud or Apple Photos, HEIC preserves the most data in the least space.
When to Convert HEIC to JPG
Sharing outside Apple ecosystem. Any time you need to send photos to Windows users, upload to a website, submit to a form, or share via email, convert to JPG first.
Web uploads. Websites that accept image uploads often don't support HEIC. Your upload may fail silently or produce an error.
Professional printing services. Print labs universally support JPEG. HEIC support varies.
Social media posting. While Instagram and Facebook accept HEIC, converting first gives you control over the quality and file size of what gets uploaded.
Sending to clients or collaborators. Unless you know they're on Apple devices, JPG is the safe default.
How to Convert HEIC to JPG
Use DevZone's HEIC to JPG Converter to convert HEIC files in your browser — no software installation needed, no upload to a server.
On macOS: Open the HEIC file in Preview, then File → Export → JPEG. Or right-click in Finder and Quick Actions → Convert Image.
On iPhone: Go to Settings → Camera → Formats → Most Compatible. This switches new photos to JPEG capture. Existing HEIC photos can be converted using the Files app or a third-party app.
On Windows: Install the HEIF Image Extensions from the Microsoft Store, then open the file in Photos and use Save as → JPEG.
Quality Loss When Converting
Converting from HEIC to JPG is a lossy operation — the image is re-compressed using JPEG's algorithm. At high quality settings (85–95%), the quality loss is virtually invisible. At lower quality settings, you'll see compression artifacts (blockiness, color banding).
A few guidelines:
- For photos you plan to share and not edit further: convert at 85–90% quality
- For photos you'll edit afterward: convert at 95%+ to preserve detail
- Never convert the same image multiple times — each re-compression adds artifacts
FAQ
Why does my HEIC photo look different in Windows?
Windows 10 and earlier don't support HEIC without a codec pack. The image may appear broken, open in the wrong app, or not open at all. Install the HEIF Image Extensions from the Microsoft Store to fix this.
Does converting HEIC to JPG lose the Live Photo?
Yes. HEIC can store multiple frames (the motion part of a Live Photo). JPG is a single-frame format — the conversion produces a still image from the key frame. The motion is lost.
Is HEIC the same as HEIF?
HEIF is the container format specification; HEIC is the file extension Apple uses. They refer to the same thing in practice. You may also see .heifs for image sequences.
Will HEIC eventually replace JPG everywhere?
Adoption is growing but slow. WebP and AVIF are competing formats with broader current support than HEIC. JPEG XL is another emerging contender. JPG will likely remain dominant for many years due to its universal compatibility.