HEIC vs PNG: Comparing Modern Image Formats

HEIC and PNG are both capable image formats that support features like transparency and high color depth, but they were designed for very different purposes. PNG has been the go-to format for lossless images and graphics on the web since the late 1990s. HEIC is Apple's modern photo format that prioritizes compression efficiency.

Understanding the differences between them helps you choose the right format for storage, sharing, and editing -- and know when converting between them makes sense.

What Each Format Does Best

PNG (Portable Network Graphics) was created in 1996 as a patent-free replacement for GIF. It uses lossless compression, meaning no image data is ever discarded. This makes PNG ideal for images where every pixel matters: screenshots, text-heavy graphics, logos, illustrations, and anything requiring transparency. The trade-off is file size -- PNG files are substantially larger than their lossy counterparts.

HEIC (High Efficiency Image Container) was designed to be a general-purpose image format with modern compression. It uses the HEVC video codec to achieve dramatically smaller file sizes than older formats. While HEIC is best known for photographs on Apple devices, it also supports transparency, lossless compression, image sequences, and HDR metadata.

Feature Comparison

| Feature | HEIC | PNG | | --- | --- | --- | | Compression Type | Lossy (default) or lossless | Lossless only | | Transparency | Yes (alpha channel) | Yes (alpha channel) | | Color Depth | Up to 16-bit per channel | Up to 16-bit per channel | | Animation | Yes (image sequences) | No (APNG exists but has limited support) | | HDR Support | Native | No | | Multiple Images | Yes | No | | Lossless Quality | Supported | Always lossless | | Typical Photo Size | ~2 MB (12 MP) | ~15-25 MB (12 MP) | | Browser Support | Safari, partial Chromium | Universal | | Editing Tool Support | Growing | Universal |

File Size: A Dramatic Difference

The biggest practical difference between HEIC and PNG is file size, and the gap is enormous -- especially for photographs.

PNG's lossless compression works by finding patterns in pixel data and encoding them efficiently, but it cannot discard any information. Photographs contain highly complex, non-repeating color data that lossless compression cannot shrink very much.

HEIC's lossy compression (the default mode) analyzes the image and removes information that the human eye is unlikely to notice, achieving far greater size reduction.

| Image Type | PNG Size | HEIC Size | HEIC Savings | | --- | --- | --- | --- | | 12 MP photograph | ~18 MB | ~1.8 MB | ~90% | | Desktop screenshot (1440p) | ~3 MB | ~0.8 MB | ~73% | | Logo with transparency | ~200 KB | ~60 KB | ~70% | | Illustration with flat colors | ~500 KB | ~120 KB | ~76% |

For photographs, storing images as PNG is impractical for anything beyond short-term editing workflows. The files are simply too large. HEIC (or JPG) makes far more sense for photo storage.

For graphics and screenshots, the gap narrows somewhat because PNG's lossless compression works more efficiently on images with large areas of uniform color, sharp edges, and repeating patterns.

Transparency Support

Both HEIC and PNG support full alpha channel transparency, which allows pixels to be partially or fully transparent. This is essential for logos, icons, overlays, and any graphic that needs to be placed on different backgrounds.

In practice, PNG has been the default format for transparent images on the web and in design workflows for over two decades. Every browser, image editor, and design tool handles PNG transparency correctly.

HEIC also supports transparency, but its limited compatibility means you generally cannot use transparent HEIC files in web design or share them reliably across platforms. If you have a transparent HEIC image and need to use it in a broader context, converting it to PNG preserves the transparency while ensuring universal compatibility.

Lossless vs. Lossy: When It Matters

PNG is always lossless. Every pixel in the output is identical to the original input. This is non-negotiable for certain use cases:

• Text and screenshots: Lossy compression can blur text edges, making them harder to read
• Technical diagrams: Fine lines and small details can degrade with lossy compression
• Pixel art: Every pixel is intentional, so any compression artifact is visible
• Source files for editing: When you plan to edit an image repeatedly, lossless formats prevent generational quality loss

HEIC supports both lossy and lossless modes, though Apple devices default to lossy compression. In lossy mode, HEIC introduces compression artifacts, but they are much less visible than equivalent JPG artifacts because the HEVC codec is more sophisticated.

If pixel-perfect accuracy is a requirement, PNG's guaranteed lossless output is the safer choice simply because every tool handles it correctly. HEIC lossless mode exists but is not widely supported or easily accessible outside Apple's ecosystem.

Compatibility

This is where PNG dominates. Like JPG, PNG is a universal format:

• Every web browser supports PNG
• Every operating system displays PNG natively
• Every image editor opens and saves PNG
• Every website and CMS accepts PNG uploads
• Every printing service handles PNG

HEIC compatibility remains limited:

• Native support primarily on Apple devices (macOS, iOS, iPadOS)
• Windows requires extension installation
• Android support varies by device and app
• Limited web browser support
• Many web applications and services reject HEIC files

For anything you plan to share, publish, or use across multiple platforms, PNG is the reliable choice. HEIC works well within the Apple ecosystem but creates friction everywhere else.

Best Use Cases

Choose PNG when:

• You are creating or sharing images with transparency for web use
• You need pixel-perfect reproduction of screenshots or graphics
• You are designing logos, icons, or illustrations
• You are working with text-heavy images where clarity matters
• You need universal compatibility across all devices and platforms
• You are preparing assets for web or app development

Choose HEIC when:

• You are capturing photos on an iPhone and want to minimize storage use
• You are working within the Apple ecosystem and do not need to share widely
• You want to store photos with embedded HDR and depth data
• You need Live Photos or image sequence support
• Storage space is a primary concern

Convert HEIC to PNG when:

• You have HEIC photos with transparency that need to go to non-Apple platforms
• You need lossless copies of HEIC photos for editing in software that does not support HEIC
• A website or application requires PNG format
• You want archival copies in a universally supported lossless format

HEICify's HEIC to PNG converter makes the conversion straightforward -- drag your files in, and the conversion happens entirely in your browser with no server uploads.

Choosing Between Them

For photographs, HEIC beats PNG on file size by a wide margin. There is rarely a good reason to store everyday photos as PNG unless you are working in a specific editing pipeline that requires it.

For graphics, screenshots, and anything with text or transparency destined for the web, PNG remains the standard. Its universal compatibility and lossless quality are hard to argue against.

The most common real-world scenario is having HEIC photos from an iPhone that need to be converted for use elsewhere. When the destination requires transparency or lossless quality, convert to PNG. When file size matters more and transparency is not needed, converting to JPG is usually the better option.

There is no single "best" format. The right choice depends on what the image contains, where it needs to go, and what features you need. Having a reliable way to convert between formats means you are never locked into one choice.