HEIC vs JPG vs PNG — Which Image Format Should You Use? | MiOffice

If you use an iPhone, your photos are saved as HEIC files by default. Try to email one to a Windows user or upload it to a website, and you hit a wall — the file is not recognized. You convert it to JPG, but now you are wondering whether you lost quality. Or maybe PNG would have been the better choice.

HEIC, JPG, and PNG each solve different problems. Understanding their strengths and limitations means you stop guessing and start choosing the right format for every situation. This guide breaks down the technical differences, real-world performance, and exactly when to use each one.

Quick Comparison Table

HEIC: Apple's Space-Saving Format

Apple introduced HEIC (High Efficiency Image Container) as the default photo format in iOS 11, released in 2017. It uses the HEVC (H.265) video codec to compress still images, which is fundamentally more efficient than the DCT compression that JPG relies on. The result is files that are roughly 50% smaller than equivalent JPGs with no visible quality difference.

HEIC supports features that JPG cannot match. It stores 16-bit color depth (versus JPG's 8-bit), supports transparency (alpha channels), and can hold multiple images in a single file — which is how Apple implements Live Photos and burst sequences. It also preserves depth maps from Portrait mode shots.

The catch is compatibility. Outside the Apple ecosystem, HEIC support is inconsistent. Chrome added support in 2023, but Firefox still does not render HEIC natively. Most web platforms, email clients, and design tools expect JPG or PNG. If you are sharing photos beyond Apple devices, you will need to convert.

• •50% smaller files — Same visual quality as JPG at half the file size
• •16-bit color — Wider dynamic range, better gradients, more editing headroom
• •Multi-image container — Live Photos, bursts, and depth maps in one file
• •Limited compatibility — Not supported by most web browsers, email clients, or design tools

JPG: The Universal Standard

JPG (also written JPEG) has been the standard photograph format since 1992. Every device, browser, operating system, email client, and social media platform in existence supports JPG. That universal compatibility is its greatest strength and the reason it remains dominant despite being technically inferior to newer formats.

JPG uses lossy DCT (Discrete Cosine Transform) compression. Each time you save a JPG, some data is permanently discarded. At high quality settings (85-95%), the loss is invisible to the human eye. At lower settings, you start seeing compression artifacts — blocky areas, color banding, and blurring around sharp edges. This is why JPG is excellent for photographs (where subtle imperfections blend into natural textures) but poor for text, logos, and graphics with hard edges.

JPG does not support transparency. If you need a cutout image — a logo on a transparent background, a product photo without a background — JPG cannot do it. You need PNG or WebP for that.

• •Universal compatibility — Works everywhere, no exceptions
• •Good compression — Small files with acceptable quality for photos
• •No transparency — Cannot store images with transparent backgrounds
• •Lossy only — Every re-save degrades quality slightly (generation loss)

PNG: Lossless Precision

PNG (Portable Network Graphics) was created in 1996 as a patent-free replacement for GIF. It uses lossless compression — no data is lost, ever. You can open, edit, and re-save a PNG a thousand times and it will be bit-for-bit identical to the original. This makes PNG the format of choice when image fidelity is non-negotiable.

PNG excels at images with sharp edges, solid colors, and text. Logos, icons, screenshots, diagrams, UI mockups, and digital illustrations all look best as PNG because there are zero compression artifacts. PNG also supports full alpha channel transparency with 256 levels of opacity, making it the standard for overlays, watermarks, and cutout images.

The tradeoff is file size. A photograph saved as PNG will be 5 to 10 times larger than the same image as JPG. For a 1920x1080 photo, that means 1.5-3 MB as PNG versus 200-400 KB as JPG. PNG compression works well on flat areas of color but is inefficient on the complex gradients and textures found in photographs. Use PNG for graphics, never for photos.

• •Lossless compression — Zero quality degradation, ever
• •Full transparency — 256 levels of alpha channel opacity
• •Perfect for graphics — Sharp text, clean edges, solid colors
• •Large file sizes — 5-10x bigger than JPG for photographs

File Size Comparison

Here is a real-world comparison using the same 12-megapixel iPhone photo (4032x3024 pixels) saved in each format:

Which Format Should You Use?

The right format depends entirely on what you are doing with the image. Here is a decision framework that covers the most common scenarios:

How to Convert Between Formats

1. 1

   Open the HEIC Converter

   Go to our free HEIC to JPG converter or the image format converter.

2. 2

   Upload Your Files

   Drag and drop your HEIC, JPG, or PNG files. Batch processing is supported — convert multiple files at once.

3. 3

   Choose Your Target Format

   Select JPG, PNG, or WebP as your output format.

4. 4

   Download Instantly

   Files are converted in your browser and download immediately. Nothing is uploaded to any server.

Related Articles

• •WebP vs PNG vs JPG: Which Format Should You Use in 2026?
• •How to Convert HEIC to JPG
• •How to Convert PNG to JPG