AVIF vs HEIF
A detailed comparison of AVIF Image and HEIF Image — file size, quality, compatibility, and which format to choose for your workflow.
AVIF Image
Raster & Vector ImagesAVIF is a next-generation image format based on the AV1 video codec. It offers significantly better compression than JPEG and WebP while maintaining excellent visual quality, including HDR and wide color gamut support.
About AVIF filesHEIF Image
Raster & Vector ImagesHEIF (High Efficiency Image File Format) is the container format behind HEIC. It supports advanced features like image sequences, depth maps, and HDR but has limited cross-platform support.
About HEIF filesStrengths Comparison
AVIF Strengths
- Best-in-class compression efficiency — 30-50% smaller than JPEG for the same quality.
- Royalty-free and patent-unencumbered (unlike HEIC).
- Supports alpha transparency, HDR, wide gamut (BT.2020), and up to 12-bit color.
- Progressive decoding: a blurry preview appears while the file is still downloading.
- Supported in all major browsers since late 2022 — no polyfills needed.
HEIF Strengths
- ~50% smaller than JPEG at equivalent quality, with better detail retention.
- Container holds multi-image bursts, depth maps, and HDR data in one file.
- Supports 10 and 12-bit color, wide gamut, and HDR out of the box.
- Default iPhone camera format since 2017 — billions of files in existence.
Limitations
AVIF Limitations
- Encoding is CPU-expensive — an AVIF export can take 10-30× longer than JPEG.
- Older software (pre-2022) cannot open AVIF without plugins.
- Email clients still largely ignore it — stick to JPEG for attachments.
- Metadata support (EXIF, XMP) exists but tooling is less mature than for JPEG.
HEIF Limitations
- HEVC codec inside .heic is patent-encumbered — licensing fees steered the web toward AVIF.
- Windows, Android, and most email clients needed plugins or recent updates to open HEIC.
- Encoding is CPU-intensive on older hardware.
- Fragmented ecosystem — the same file extension (.heif) can hold incompatible codecs.
Technical Specifications
| Specification | AVIF | HEIF |
|---|---|---|
| MIME type | image/avif | — |
| Container | HEIF (ISOBMFF) | ISO Base Media File Format (ISOBMFF) |
| Codec | AV1 (intra-only) | — |
| Max dimensions | 65 536 × 65 536 px | — |
| Color depth | Up to 12-bit per channel | — |
| Color spaces | sRGB, Display-P3, BT.2020, arbitrary ICC | — |
| MIME types | — | image/heif, image/heic |
| Extensions | — | .heif, .heic, .heifs, .heics |
| Codecs | — | HEVC (H.265), AV1, VVC (H.266) |
| Standard | — | ISO/IEC 23008-12 |
Typical File Sizes
AVIF
- Thumbnail (400px) 10-30 KB
- Web photo (1920px) 80-300 KB
- 4K photo (3840px) 300 KB - 1.2 MB
- Lossless copy of 24MP photo 8-15 MB
HEIF
- iPhone photo (12 MP) 1-3 MB
- Portrait mode (with depth map) 2-4 MB
- Burst of 10 shots 5-15 MB
- 4K ProRAW-equivalent HEIF 10-30 MB
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Frequently Asked Questions
AVIF (AV1 Image File Format) is a cutting-edge image format derived from the AV1 video codec, backed by the Alliance for Open Media. It delivers up to 50% smaller files than JPEG with equal or better visual quality, plus HDR and transparency support.
HEIF (High Efficiency Image File Format) is a container format based on HEVC compression, standardized by MPEG in 2015. It can store still images, image sequences, and auxiliary data like depth maps. HEIC is the most common HEIF variant.
AVIF files open in Chrome, Firefox, Safari (from macOS Ventura), Edge, and GIMP 2.10+. Support is growing rapidly, but some older image editors may not yet handle AVIF natively.
HEIF files open natively on Apple devices (iOS 11+, macOS High Sierra+), Windows 10/11 with the HEIF extension installed, and modern versions of GIMP, Photoshop, and Google Photos.
AVIF provides better compression and quality than WebP, especially for photographs. However, WebP has broader software support today. Use AVIF for maximum performance on modern browsers and WebP as a reliable fallback.
HEIF is the container format specification, while HEIC is a specific implementation using HEVC codec for compression. In practice, iPhone photos labeled as HEIC are HEIF files. The terms are often used interchangeably for Apple device photos.