What will I receive?
HEIF to AVIF
The AVIF result is a static 8-bit image with adjustable quality and compatible transparency. Check that the receiving application supports AVIF; a smaller file is not guaranteed.
Convert HEIF to AVIF online
Create a AVIF copy of an image identified as HEIF. HEIC belongs to this container family; renaming a file does not convert it.
Automatic deletion
InputHEIFOutputAVIF
Step 1 of 3 · Files
Expires in 24 h- Files
- Format
- Result
Select HEIF files
From your phone, computer, or drag them here. HEIF · 50.0 MB per file · up to 5
The listed formats are accepted. Each file's structure is validated before conversion.
Conversion limits
What limits apply?
Up to 5 files, 50 MB each. Encrypted files, animations and unsafe content are not accepted. Structural validation may reject a conversion.
Input and output expire automatically after the period shown in the converter. Download your result before then.
Practical guide
Convert HEIF to AVIF: limits and checks
HEIF names a container family, and this page starts from a file whose structure has been positively identified. It is a narrow modern conversion for a destination that supports AVIF and needs a separate delivery copy. This guide explains what changes from HEIF to AVIF and what to inspect before publishing the result.
When HEIF to AVIF is appropriate
HEIF names a container family, and this page starts from a file whose structure has been positively identified. It is a narrow modern conversion for a destination that supports AVIF and needs a separate delivery copy.
What the HEIF input may contain
HEIF is a container family, so the extension alone is insufficient: one decodable primary image is required; sequences, depth, thumbnails and auxiliary items are not exported.
How the AVIF output is built
The decoder takes the primary item from the validated HEIF and does not preserve its container structure. The primary image is normalised to 8-bit sRGB and re-encoded as AVIF with adjustable quality and compatible alpha; metadata is removed.
How to compare HEIF and AVIF
Zoom into texture, skin, sky and edges; modern re-encoding adds no detail and does not guarantee a smaller file. Keep the HEIF: renaming the extension does not convert it, and the output retains neither container structure nor metadata.
Also compare HEIF to WEBP and HEIC to AVIF when the destination needs a different trade-off.
Frequently asked questions
Which HEIF input does this conversion accept?
HEIF is a container family, so the extension alone is insufficient: one decodable primary image is required; sequences, depth, thumbnails and auxiliary items are not exported.
What does the resulting AVIF contain?
The decoder takes the primary item from the validated HEIF and does not preserve its container structure. The primary image is normalised to 8-bit sRGB and re-encoded as AVIF with adjustable quality and compatible alpha; metadata is removed.
Should I delete the HEIF afterwards?
Keep the HEIF: renaming the extension does not convert it, and the output retains neither container structure nor metadata.