Convert HEIF to AVIF
Convert HEIF images to AVIF when your target platform supports AVIF and maximum size reduction is a priority.
Source Images Stay Local
85%
Drag & drop your images here
or click to browse, or paste (Ctrl+V)
Supports HEIC, HEIF, WebP, PNG, JPG, AVIF, BMP
How to Convert HEIF to AVIF
1
Drag and drop your HEIF files into the box above, or click to browse.
2
Files are converted to AVIF instantly in your browser.
3
Download each file or use Download All for batch output.
Known limitations
Before converting, note these constraints:
- Output behavior follows format capabilities (for example transparency support and lossy/lossless rules).
- Final file size depends on source image content and selected quality settings.
- If compatibility is critical, choose broadly supported targets first (typically JPG).
Frequently Asked Questions
Why convert HEIF to AVIF?
AVIF uses AV1-based compression and may reduce size for some sources and settings. Compare actual outputs and verify target support.
When should I choose WebP or JPG instead?
Choose WebP or JPG when compatibility requirements include older browsers, legacy apps, or upload endpoints without AVIF support.
Why is the output file sometimes larger than the original?
Output can grow when a lossy source is written to lossless PNG, when codec or container overhead dominates a small image, or when the source is already efficiently compressed. Results depend on the image, format, and settings; no fixed saving is guaranteed. PicShift uses MozJPEG, OxiPNG, and libwebp-based workflows, but those implementation choices do not guarantee the smallest possible file. In compress mode, PicShift keeps the original when the generated result is larger. Learn more: https://picshift.app/docs/size-increase-explainer