HEIC vs JPEG: Apple's Format vs the Universal Standard
HEIC stores your iPhone photos at roughly half the size of JPEG with no visible quality loss, but only Apple devices read it natively. Here is when to convert.
If you've ever AirDropped a photo from an iPhone to a Windows laptop and got a .heic file that nothing wanted to open, you've already met the format. Here's what HEIC actually is, why Apple picked it, and when to convert it to JPEG.
What HEIC actually is
HEIC stands for High-Efficiency Image Container. It's Apple's wrapper around the HEIF format, which itself is a still-image profile of the HEVC (H.265) video codec. Same underlying compression technology as your iPhone's 4K video, applied frame-by-frame to stills.
That means HEIC files are roughly 40-50% smaller than JPEG at the same visual quality, with the trade-off that decoding requires more CPU than JPEG. Modern phones have HEIC hardware-accelerated, so the cost is invisible. Older devices and most non-Apple software have to decode in software, which is where compatibility breaks down.
Why iPhones save HEIC by default
Storage. A 12 MP photo takes ~3 MB as JPEG, ~1.8 MB as HEIC. Multiply by 50,000 photos in a typical iCloud library and the savings are real.
You can switch your iPhone to capture JPEG in Settings → Camera → Formats → Most Compatible, at the cost of using ~1.5× the storage.
When HEIC is fine
- Sharing AirDrop-to-AirDrop. Every Apple device reads HEIC natively.
- Photo library stays in Apple ecosystem. iCloud, Photos.app, macOS Preview all handle it.
- iPhone screenshot or photo you'll never share. No conversion needed.
When you must convert HEIC → JPEG
- Sending to a non-Apple recipient. Windows reads HEIC in 2026 but only if codecs are installed.
- Uploading to most CMSes and web apps. WordPress, Shopify, most forums don't accept HEIC.
- Sharing on social media via desktop. Browser upload pickers often reject HEIC.
- Email attachments to anyone outside iCloud. Many email clients show a broken icon for HEIC.
- Photo editing in older Photoshop versions. Pre-2020 software may need the converted file.
The conversion process
OmegaPix's HEIC to JPG converter runs entirely in your browser via WASM. Drop the .heic file or a batch of them, download converted JPEGs. Quality slider preserves whatever level you choose; default is 90, which retains the original visual fidelity. Files never upload anywhere.
The conversion is lossy: HEIC → decoded pixels → JPEG re-encoded. Quality 90 makes that re-encode visually imperceptible. Quality 95 makes it provably perceptually-identical to the source.
File size comparison
A typical iPhone 14 photo:
| Format | Size | Quality |
|---|---|---|
| HEIC (source) | 1.8 MB | Original |
| JPEG q95 | 2.7 MB | Visually identical |
| JPEG q90 | 2.1 MB | Indistinguishable from original at normal view |
| JPEG q80 | 1.3 MB | Minor artefacts on close inspection |
| WebP q80 | 1.1 MB | Matches JPEG q90 |
If you're converting to share, JPEG q90 is the sweet spot. If you're converting for web delivery, route through PNG to WebP (which accepts JPEG input too) or AVIF Converter for further compression.
Recommendation
Leave your iPhone capturing HEIC. Convert to JPEG only when the destination requires it. For web delivery, go one step further and convert to WebP or AVIF.
Related
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