Does HEIC to AVIF upload my file or text to Tool-You servers?

No. HEIC to AVIF runs in this browser tab. Files stay on the device. Limit note: AVIF with quality slider. First HEIC frame. Max 20 MB.

Should I use HEIC to WEBP instead of HEIC to AVIF?

Use HEIC to AVIF when you need Decode HEIC and encode AVIF. Use HEIC to WEBP when you need Decode HEIC and encode WEBP. They share a category (Images) but not the same job.

HEIC to AVIF

Decode HEIC and encode AVIF.

Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.

What HEIC to AVIF does

Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.

Practical limit for HEIC to AVIF: AVIF with quality slider. First HEIC frame. Max 20 MB. That is why output can differ from heavy desktop Images software. Read the tool-specific note again: Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.

How to use HEIC to AVIF

Stay on this HEIC to AVIF page (/heic-to-avif). Do not switch to HEIC to WEBP unless you actually want Decode HEIC and encode WEBP..
Add the file type HEIC to AVIF accepts. Hint from the path: heic to avif. Decode HEIC and encode AVIF.
Set only the options that match HEIC to AVIF. Neighbor HEIC to JPG does something else (Convert iPhone HEIC photos to JPEG.). Tool note: Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.
Run HEIC to AVIF in this tab. Browser memory still applies: AVIF with quality slider. First HEIC frame. Max 20 MB.
Download or copy the result from HEIC to AVIF. If it is the wrong job, open HEIC to WEBP instead.

When not to use HEIC to AVIF

Skip HEIC to AVIF when a neighbor tool matches better — start with HEIC to WEBP or HEIC to JPG — or when the description already warns the job will fail. In the tool’s own words: Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.

Questions about HEIC to AVIF

What does HEIC to AVIF do that other Images pages on this site do not?: Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB. Short version: Decode HEIC and encode AVIF.
Does HEIC to AVIF upload my file or text to Tool-You servers?: No. HEIC to AVIF runs in this browser tab. Files stay on the device. Limit note: AVIF with quality slider. First HEIC frame. Max 20 MB.
Should I use HEIC to WEBP instead of HEIC to AVIF?: Use HEIC to AVIF when you need Decode HEIC and encode AVIF. Use HEIC to WEBP when you need Decode HEIC and encode WEBP. They share a category (Images) but not the same job.
What are the limits of HEIC to AVIF?: AVIF with quality slider. First HEIC frame. Max 20 MB. Also: Uses heic2any then AVIF with a quality slider. Unlike HEIC to WEBP this is AVIF. Unlike HEIC to JPG this is not JPEG. First frame only. Max 20 MB.