HEIF vs HEIC: What’s the Difference?

HEIF and HEIC are two terms that often appear together, and the confusion between them is understandable. They are closely related but not identical. If you have been wondering whether your .heif and .heic files are the same thing, or why some devices use one extension while others use the other, this guide will clear everything up.

What Is HEIF?

HEIF stands for High Efficiency Image Format. It is a container format — think of it as a box that can hold images compressed using different codecs. HEIF was standardized by the Moving Picture Experts Group (MPEG) in 2015 as part of the MPEG-H standard. The HEIF specification defines how images, sequences, and metadata are stored within the container, but it does not mandate a specific compression algorithm. This means a HEIF file could theoretically use various different codecs.

What Is HEIC?

HEIC stands for High Efficiency Image Container (sometimes expanded as High Efficiency Image Codec). It is a specific type of HEIF file that uses the HEVC (H.265) codec for image compression. When Apple adopted HEIF as the default photo format for iPhones, they chose HEVC as the compression codec, and the resulting files use the .heic extension. So HEIC is HEIF plus HEVC — a specific combination of the container format and compression method.

The Container vs Codec Analogy

The easiest way to understand the relationship is with an analogy from video formats. An MP4 file is a container that can hold video encoded with different codecs like H.264, H.265, or AV1. Similarly, HEIF is a container that can hold images encoded with different codecs. When the codec is HEVC, the specific container is called HEIC. When the codec is AV1, the container would be called AVIC (though this is more commonly known as AVIF). The container defines the structure; the codec defines the compression.

Why Do Both Extensions Exist?

The file extension tells software which codec to expect inside the container. A .heif file could theoretically use any codec supported by the HEIF standard. A .heic file specifically uses HEVC. In practice, almost all HEIF files you encounter are actually HEIC files (using HEVC), and many software applications treat the two extensions identically. The distinction exists for technical correctness, but for everyday use, they are interchangeable.

Which Extension Does iPhone Use?

iPhones save photos with the .heic extension because they use HEVC compression. Some other devices and applications use the .heif extension instead, even when the underlying compression is the same. When you see .heif files from non-Apple cameras or Android devices, they usually contain HEVC-compressed images identical in structure to .heic files from iPhones.

Do They Convert Differently?

No. From a conversion standpoint, .heic and .heif files are handled identically. Any tool that converts HEIC files will also convert HEIF files using the same process. The HEICtoJPG converter accepts both extensions and processes them identically. There is also a dedicated HEIF to JPG converter page for users specifically searching for HEIF conversion.

Other HEIF Variants

While HEIC (HEVC) is by far the most common HEIF variant, the standard supports other codecs. AVIF uses the AV1 codec inside a HEIF-like container and is gaining popularity as a royalty-free alternative. Some applications use HEIF with AVC (H.264) compression, which produces slightly larger files but has broader hardware decoder support. In the future, codecs like VVC (H.266) may also be used within HEIF containers.

Practical Advice

• If you have .heic files from an iPhone, they use HEVC compression.
• If you have .heif files from another device, they most likely also use HEVC compression.
• Both file types convert identically to JPG, PNG, or WebP.
• Any converter that supports one format will support the other.
• You do not need different tools or different processes for .heic and .heif files.

The Bottom Line

HEIF is the standard, HEIC is the most common implementation. For most people, the distinction does not matter at all. If you need to convert either format, the process and tools are the same. Use the converter for HEIC files or the HEIF converter for HEIF files — both produce the same high-quality results.