Every week I get the same message from a family member: 'I sent you a photo but you're saying it won't open?' They took it on an iPhone. I opened it on Windows or Android. The file ends in .heic. My laptop shrugs. Their phone is confused because on their end it looked fine.
HEIC is one of those rare tech decisions that is genuinely better on the merits and genuinely annoying in practice. Here's what's actually going on.
What HEIC actually is
HEIC stands for High Efficiency Image Container. Inside it is an image encoded with HEVC — the same video codec Netflix, Apple TV and Blu-rays use. Apple's engineers looked at HEVC, realised a single frame of it was a much better still image than JPEG, and started saving photos in that format on iOS 11 (2017).
The result: an HEIC photo is roughly half the size of a JPEG at the same quality. That's why your 128 GB iPhone can hold ~35,000 photos instead of ~18,000. It's a real, measurable win — every iPhone photo you take is a small victory over storage bloat.
Why Windows and Android hate it
HEVC is patented. Not one patent — a thicket of them, held by dozens of companies and licensed through pools. To decode HEVC legally, an operating system has to pay per-device royalties. Apple pays. Microsoft passes the cost to users (the HEVC extension on the Microsoft Store is $0.99). Google decided the cost wasn't worth it and shipped WebP/AVIF instead. Result: your Pixel can't natively open your iPhone's photos, and neither can half the web.
This is why HEIC support is a mess. It has nothing to do with the format being bad — it's a licensing standoff. AVIF, which is technically similar and royalty-free, is slowly replacing it, but Apple hasn't moved yet.
The right way to convert
If you just need one photo to send to someone: convert to JPEG at quality 92. The file will be roughly double the size of the HEIC, but visually identical, and it opens on literally every device made in the last 25 years.
If you're converting a whole vacation album to archive: convert to JPEG quality 88. The size hit is smaller and you preserve all the visible detail. Or, if you know the recipient uses modern browsers/phones, convert to WebP — you get HEIC-level compression without the licensing drama.
Never convert to PNG. HEIC → PNG makes the file 5–10× larger for zero quality gain, because PNG is lossless and photos don't benefit from lossless encoding. This is the single most common mistake I see.
What gets lost in conversion
Not much, if you do it right. A quality-92 JPEG from an HEIC source is visually indistinguishable from the original in blind tests — I've tried this on a colour-calibrated 5K monitor and I couldn't reliably pick which was which.
What you should preserve: EXIF metadata (date, GPS, camera info) and orientation flags. Any decent converter keeps both. What HEIC has that JPEG doesn't: 10-bit colour depth, transparency, burst-mode sequences bundled in one file, and Apple's 'Live Photos' motion. If those matter to you, convert to HEIF/AVIF instead. If they don't, JPEG is fine forever.
Why not just email the HEIC?
When you AirDrop or attach a photo, iOS actually offers to auto-convert. In iPhone Settings → Photos → 'Transfer to Mac or PC', you can pick 'Automatic' (converts to JPEG) or 'Keep Originals' (sends the HEIC). Most people are on 'Keep Originals' without realising it, which is why the file lands unreadable.
The permanent fix — if you don't care about the storage savings on your phone — is to go to Settings → Camera → Formats and switch from 'High Efficiency' to 'Most Compatible'. Your phone will start saving new photos as JPEG. Old HEICs on the phone stay HEIC; only new ones change.
If you like the storage savings and just want the recipient side to work, convert on demand. A browser-based converter never uploads your photo — the file goes from HEIC to JPEG right in your tab. For anything with a face, a signed document, a passport, or a private moment, this matters. Every 'free HEIC converter' website that isn't running in your browser is quietly logging your family photos to a server in a data centre somewhere.
