What Is HEIC? Differences from JPG and Why You Need to Convert

Have you ever noticed that your iPhone photos have a ".heic" extension? This guide explains what HEIC is, how it differs from JPG, and why you sometimes need to convert.

What Is HEIC?

HEIC (High Efficiency Image Container) is a container format for HEIF (High Efficiency Image Format) images. It has been the default photo format on iPhones since iOS 11, released in 2017.

True to its name — "High Efficiency" — HEIC stores images at the same quality as JPG in roughly half the file size.

HEIC vs. JPG

Advantages of HEIC

1. Smaller File Size

HEIC stores images at roughly 50% of the equivalent JPG file size. This significantly saves iPhone storage. For example, a 4 MB JPG becomes about 2 MB in HEIC.

2. Higher Quality

At the same file size, HEIC produces higher-quality images than JPG — especially in gradients and fine details.

3. 16-Bit Color Support

While JPG is limited to 8-bit color (~16.7 million colors), HEIC supports up to 16-bit (~281 trillion colors) for richer color reproduction.

4. Transparency and Animation

HEIC supports transparency and animated images — features not available in JPG.

Disadvantages of HEIC (Why Conversion Is Needed)

1. Incomplete Windows Support

On Windows 10, you need to install "HEIF Image Extensions" (sometimes paid) to open HEIC files. Windows 11 has native support, but some applications still can't handle it.

2. Most Web Services Don't Accept HEIC

Many platforms that accept image uploads — blogs, e-commerce sites, online forms — only support JPG and PNG.

3. Print Services Don't Accept HEIC

Most photo printing and greeting card services require JPG files.

4. Difficult to Share

When sharing photos, you can't always be sure the recipient's device supports HEIC.

When to Convert HEIC to JPG

• Transferring photos to a Windows PC
• Uploading images to websites or blogs
• Submitting to photo printing services
• Sharing with Android users
• Editing in older image editing software

Why Apple Uses HEIC on iPhones

Apple adopted HEIC primarily to save storage. With iPhone cameras shooting at 12 MP and 48 MP, photos in JPG take up significant space. HEIC cuts file sizes roughly in half at the same quality, letting users store more photos on their devices.

Frequently Asked Questions (FAQ)

What is the difference between HEIC and HEIF?

HEIF (High Efficiency Image Format) is the format specification, while HEIC (High Efficiency Image Container) is the container format that uses HEVC compression. iPhone photos are saved with the .heic extension. For practical purposes, "HEIC" means "iPhone photo format."

Does converting HEIC to JPG change the file size?

Generally, converting HEIC to JPG increases the file size by 1.5–2×, because HEIC uses more efficient compression. You can reduce the JPG file size by lowering the quality setting.

Is it safe to delete HEIC files after conversion?

Yes, once you've confirmed the converted JPG looks correct. However, since HEIC offers higher quality at a smaller size, keeping the originals is recommended if you have the storage.

Do Android phones use HEIC too?

Some Android phones (e.g., Samsung Galaxy S10 and later) support HEIC capture, but most save photos as JPG by default.

Summary

HEIC is a superior image format — higher quality and smaller files than JPG — but limited compatibility means you'll still need to convert in many situations. With sakutto's HEIC converter, you can quickly and safely convert to JPG right in your browser.