Convert HEIC to AVIF — Modern Compression, Wider Support
Both HEIC and AVIF use advanced compression derived from video codecs, but AVIF enjoys far broader browser and platform support. Converting your iPhone HEIC photos to AVIF makes them web-ready while maintaining the excellent compression efficiency you’re used to. AVIF is backed by the Alliance for Open Media, making it royalty-free and widely adopted.
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HEIC, WEBP, AVIF, TIFF, BMP, SVG, GIF, PNG, JPG, PDF, CR2, NEF, ARW, DNG — up to 50MB each, or 50 from a folder
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Modern format with excellent compression. Limited browser support.
Apple's format. Excellent quality at small sizes.
Lossless format. Large files, ideal for print/archival.
256 colors max. Best for simple graphics.
Uncompressed bitmap. Very large files.
Vector trace. Best for logos and simple graphics. Not a pixel-perfect conversion.
Same format? You might want to compress instead.
SSIM-optimized — finds the lowest file size at your chosen visual fidelity.
Need to crop first? Use the Crop tool. Want to adjust or filter? Try the Editor.
Resize tool → Live preview, percentage scaling, and dimension presets.
Tip: Use PNG or WebP for transparent output. Standalone tool →
Lossless format — files can be large
GIF is limited to 256 colors
Best for logos, icons, and line art. Photos produce stylized results.
BMP files are uncompressed and can be very large. Consider TIFF (LZW) or PNG for lossless with smaller file sizes.
Leave empty for all pages. Multi-page PDFs produce a ZIP.
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HEIC vs AVIF Comparison
| Feature | HEIC | AVIF |
|---|---|---|
| Full Name | High Efficiency Image Container | AV1 Image File Format |
| Lossy Compression | ✅ | ✅ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ✅ | ✅ |
| Animation | ❌ | ✅ |
| Browser Support | Safari, iOS; limited elsewhere | Chrome 85+, Firefox 93+, Safari 16.4+ |
| Color Depth | 16.7M (24-bit) | 16.7M+ (up to 12-bit HDR) |
| Typical Use | iPhone/iPad photos (default since iOS 11) | Next-gen web images (even smaller than WEBP) |
| Year Introduced | 2015 | 2019 |
Why Convert HEIC to AVIF?
AVIF is supported by Chrome, Firefox, Safari 16.4+, and Edge — covering over 95% of web users. HEIC, by contrast, is mainly supported on Apple devices and Safari. If you need to share iPhone photos on the web, embed them in HTML emails, or use them in cross-platform applications, AVIF gives you equivalent compression with universal reach.
How to Convert HEIC to AVIF
Upload your HEIC file by dragging it into the converter or clicking to browse. Files up to 50 MB are supported.
KoalaPic decodes the HEIC image and re-encodes it to AVIF using optimized AV1 compression settings. Default quality is 80%.
Download your compact AVIF file. The original HEIC and converted AVIF are both automatically deleted after 1 hour.
Quality Note
Both HEIC and AVIF use advanced compression derived from modern video codecs (HEVC and AV1 respectively). At quality 80+, the AVIF output is visually identical to the HEIC source. File sizes are comparable, with AVIF often producing slightly smaller files for photographic content.