Your iPhone takes all its photos in HEIC. Most of the internet runs on JPG. Understanding why both exist — and when to use each — saves you a lot of confusion when you're trying to share, edit, or upload photos.
What Is HEIC?
HEIC stands for High Efficiency Image Container. Apple introduced it in iOS 11 (2017) as the default photo format. The compression algorithm inside it (HEVC, also called H.265) is much smarter than the one inside JPG — it can represent the same visual information using fewer bits.
In practice: a typical iPhone photo taken in HEIC is around 3–4 MB. The same shot in JPG at equivalent quality would be 6–8 MB.
What Is JPG?
JPG (or JPEG — same thing, different extension) is from 1992. It's the dominant photo format on the web, in email, and in every piece of software ever made. The compression isn't as efficient as HEIC, but the compatibility is essentially universal.
Windows, Android, web browsers, social media platforms, photo editors, printers — everything accepts JPG without complaints.
Side-by-Side Comparison
| | HEIC | JPG | |---|---|---| | File size (typical photo) | ~3–4 MB | ~6–8 MB | | Quality at same size | Better | Good | | Windows support | Partial (paid extension needed) | Universal | | Web browser support | Limited | Universal | | Social media | Usually auto-converted on upload | Native | | Editing software | Newer apps only | All apps | | Transparency | Yes (HEIC can store alpha) | No |
The Core Trade-Off
HEIC wins on efficiency. For the same visual quality, HEIC files are roughly half the size. If you shoot thousands of photos a year and storage matters, HEIC is the better format to keep photos in.
JPG wins on compatibility. If you're sharing photos, posting online, attaching to emails, or sending to anyone not on a recent Mac/iPhone, JPG is the safe default. No one ever complains that they can't open a JPG.
When to Use HEIC
- Storing photos on your iPhone or Mac where you control the environment
- Archiving photos when storage is limited
- Shooting bursts or Live Photos (HEIC handles multi-frame images natively)
When to Convert to JPG
- Sharing with Windows or Android users
- Uploading to websites, forms, or cloud tools that don't accept HEIC
- Sending to a print shop or photo lab
- Using with older photo editing software
Does Converting HEIC to JPG Lose Quality?
Yes — but the loss is negligible at quality settings above 85%. JPG compression is "lossy," meaning it discards some data to shrink the file. At the default 92% quality setting in most converters, the result looks identical to the original HEIC in any realistic viewing scenario.
The only time you'd notice a difference is at very high zoom levels on sharp edges, or if you convert repeatedly (each round of JPG compression degrades the image slightly). Convert once, store that JPG, and you're fine.
The Quick Answer
- Keep HEIC on your phone — you benefit from smaller files at no quality cost.
- Convert to JPG before sharing or uploading — you avoid compatibility issues.