HEIC vs JPG: Comparing iPhone and Universal Formats
If you own an iPhone, your photos are probably saved as HEIC files. If you try to share them with a Windows user or upload them to a website that expects JPG, you run into compatibility problems. HEIC and JPG represent two different eras of image compression, and the tension between them affects millions of people daily.
HEIC offers dramatically smaller files and modern features. JPG offers universal compatibility. Here is how they compare and when you should convert between them.
HEIC vs JPG: Head-to-Head Comparison
| Feature | HEIC | JPG |
|---|---|---|
| Compression type | Lossy (HEVC-based) | Lossy (DCT-based) |
| File size at same quality | ~50% smaller than JPG | Baseline reference |
| Color depth | Up to 16-bit, HDR | 8-bit only |
| Transparency | Supported | Not supported |
| Live Photos | Stores photo + video | Photo only |
| Browser support | Safari only | Universal (100%) |
| Editing software | Apple apps, Adobe suite | Every image editor |
| Depth maps | Embedded (Portrait mode) | Not supported |
| Licensing | HEVC patents (royalties) | Royalty-free |
| Multiple images | Yes (bursts, sequences) | One image per file |
Why HEIC Files Are Half the Size
HEIC uses the HEVC (H.265) video codec for compression, which is roughly a generation ahead of the DCT-based compression in JPG. HEVC employs advanced techniques including variable block sizes (from 4x4 to 64x64 pixels), more sophisticated prediction modes, and better entropy coding. The result is roughly 50% smaller files at the same visual quality.
For an iPhone with 128GB of storage, this means approximately double the photo capacity. A typical iPhone photo might be 3.5MB as JPG but only 1.5MB as HEIC. Over thousands of photos, that storage savings is substantial.
The Compatibility Divide
JPG works everywhere. Every browser, every operating system, every email client, every social media platform, every image editor, every printer, and every point-of-sale system supports JPG. It is the closest thing to a universal image format that exists.
HEIC is largely an Apple ecosystem format. Safari is the only browser with native HEIC support. Windows requires a free extension from the Microsoft Store. Many web-based tools and older software do not recognize HEIC at all. This compatibility gap is the primary reason to convert HEIC to JPG before sharing outside Apple's ecosystem.
Features That JPG Cannot Match
HEIC supports several features beyond what JPG offers. Live Photos (still image + short video clip) are stored in a single HEIC container. Portrait mode depth maps are embedded directly in the file. HEIC supports 16-bit color depth and HDR metadata for richer image data. Multiple images (burst shots) can be stored in one file.
These features are tightly integrated into the Apple ecosystem. iPhones use them transparently, and Apple Photos leverages depth maps for post-capture blur adjustments. When you convert HEIC to JPG, these extra features are lost.
The Patent Question
HEIC's HEVC codec is encumbered by patents held by multiple licensing pools. Apple pays licensing fees to use HEVC on its devices, but this patent situation has hindered broader adoption. Other companies face royalty obligations to implement HEIC support.
JPG is royalty-free. Anyone can implement a JPG encoder or decoder without paying license fees. This is why JPG is supported in every piece of software ever written for image handling. The AVIF format, which offers similar compression improvements to HEIC, was specifically designed to be royalty-free as a more adoption-friendly alternative.
When to Convert HEIC to JPG
You should convert HEIC to JPG when sharing photos with non-Apple users who may not have HEIC support, uploading images to websites that do not accept HEIC, printing photos through services that require JPG, editing in software that does not support HEIC, or archiving in a universally compatible format for long-term access.
Note that iOS automatically converts HEIC to JPG when sharing via AirDrop to non-Apple devices or when using the "Most Compatible" sharing option. But for bulk conversion or more control over the process, a dedicated converter gives you better results.
Frequently Asked Questions
Are HEIC photos lower quality than JPG?
No. HEIC photos are the same quality or better at a smaller file size. HEIC achieves roughly 50% file size reduction at equivalent visual quality. The compression is simply more efficient than JPG's 30-year-old algorithm.
Can I change my iPhone to save as JPG instead of HEIC?
Yes. Go to Settings > Camera > Formats and select Most Compatible. This saves photos as JPG and videos as H.264. The tradeoff is larger files, which means fewer photos can fit on your device.
Does converting HEIC to JPG lose quality?
Converting between any two lossy formats involves some quality loss. However, at JPG quality 90-95, the loss from HEIC-to-JPG conversion is imperceptible for normal viewing. The resulting JPG will look identical to the HEIC original in practical use.