File basics
HEIC vs HEIF: What Is the Difference?
Learn how HEIF, HEIC, and HEVC relate, why iPhone photos usually end in .heic, and what those terms mean when opening or converting an image.
HEIF is the format; HEIC is a common extension
HEIF stands for High Efficiency Image File Format. MPEG standardizes the image file format in ISO/IEC 23008-12, describing a container for coded images and related information. A HEIF file can represent a primary image and can also carry thumbnails, auxiliary images, sequences, and metadata. MPEG’s image file format overview (opens in a new tab)
HEIC is not a separate competing image system in the way PNG or JPEG is. It is a widely used filename extension for a HEIF file whose images are commonly encoded with HEVC. That is why software may describe the same iPhone photo as a HEIF image, a HEIC file, or HEIF/HEVC media.
Where HEVC fits
HEVC stands for High Efficiency Video Coding and is also known as H.265. Despite the word “video,” HEVC can encode individual still images. HEIF provides the file structure around those coded image items; HEVC provides a common compression method for the pixels inside an iPhone HEIC photo.
Apple distinguishes the terms in its documentation: HEIF is used for photos, while HEVC is used for videos and for coding image data within common Apple media workflows. Apple added built-in support with iOS 11 and macOS High Sierra. Apple’s HEIF and HEVC explanation (opens in a new tab)
Why extensions and labels can vary
A file extension is a hint used by operating systems and apps; it does not fully describe everything inside a container. Two HEIF files can use different image codecs or carry different combinations of still images and auxiliary data. An app that recognizes one combination may not decode every HEIF file it receives.
This is also why renaming a file from .heic to .jpg or .png does not convert it. The encoded data remains unchanged. A real conversion must decode the image item and then encode its pixels in the destination format.
| Term | What it describes | What you usually see |
|---|---|---|
| HEIF | The image file format and container family | Documentation and format labels |
| HEIC | A common extension for HEVC-based HEIF images | iPhone photo filenames |
| HEVC / H.265 | A compression standard used for coded image or video data | Codec requirements and compatibility messages |
What this means when you convert a file
- Choose a converter that explicitly supports HEIC or HEIF decoding; changing the extension is not enough.
- Expect a basic converter to export the primary still image, not every possible sequence or auxiliary item.
- Keep the original when depth data, edits, bursts, Live Photo relationships, or metadata may matter later.
- Check the destination file’s dimensions, orientation, color, and item count before removing the source.
- Use PNG for a broadly supported lossless working copy, understanding that it may be much larger.
Sources and further reading
We use primary technical documentation for the claims in this guide.
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