What is HEIC, exactly?
HEIC is a HEIF container using HEVC (H.265) compression — Apple's default camera format since iOS 11 in 2017. It's fundamentally a photographic format, designed to store camera images at high quality in small files. PNG, by contrast, is a graphics format built for lossless fidelity and universal compatibility, not for squeezing down photos.
PNG vs HEIC at a glance
| Feature | PNG | HEIC |
|---|---|---|
| Type | Graphics | Photographic |
| Compression | Lossless | Lossy (HEVC) |
| File size | Large | Very small |
| Stores | Pixels + alpha | Depth, Live Photo, HDR |
| Support | Universal | Apple-centric |
| Best for | Logos, screenshots, sharing | iPhone photo storage |
Why won't my HEIC photo open?
HEIC depends on the patent-encumbered HEVC codec, so support is uneven: excellent on Apple devices, partial on Windows and Android, and limited on the web. That's the source of the familiar problem — an iPhone photo emailed to a PC that simply won't open — and the main reason people convert HEIC to a universal format like PNG or JPG.
What does HEIC store that PNG can't?
HEIC is more than a picture: a single file can carry depth maps, Live Photo motion, burst sequences, and HDR gain maps. PNG holds only the pixels and an alpha channel. So converting HEIC to PNG preserves the photo itself but discards those Apple-specific extras — usually fine, unless you specifically need the depth or motion data.
When should you use each?
Use HEIC to fit thousands of high-quality photos on an iPhone without filling storage. Use PNG for any image you need to share, edit, or display reliably across platforms and the web — and remember PNG is a graphics format, so for ordinary photos a smaller lossy format like JPG or WebP is often the more practical universal choice.
How do you convert a HEIC photo?
If an iPhone photo won't open, converting it to a universal format fixes it instantly. For photos, weigh PNG against a smaller lossy file in PNG vs JPG; if you're unsure what PNG is best suited to, start with what a PNG is.
Frequently asked questions
- Is HEIC better than PNG?
- For storing phone photos compactly on an Apple device, yes. For graphics, editing, and opening reliably across platforms, PNG. They're built for different jobs.
- Why won't my HEIC file open on Windows or Android?
- HEIC relies on the patented HEVC codec, and support outside Apple's ecosystem is patchy. Converting the photo to PNG or JPG produces a file that opens anywhere.
- Why is HEIC so much smaller than PNG?
- HEIC uses modern HEVC video compression, which is far more efficient than PNG's lossless approach — at the cost of being lossy and far less compatible.
- Should I turn off HEIC on my iPhone?
- If you often share with non-Apple devices, switching the camera to 'Most Compatible' saves photos as JPG and avoids constant conversion. Otherwise HEIC saves storage.