https://www.omglinux.com/shotwell-updates-supports-avif-heic-images/
Shotwell Photo App Now Supports AVIF, HEIC & WebP - OMG! Linux
Apr 23, 2023 - A new version of Linux photo manager and image editor Shotwell is available to download. Shotwell 0.32.0 is the first major release of the app since last
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https://kraken.io/
Kraken.io Image Optimizer - Compress your JPG, PNG, WebP, GIF, SVG, AVIF, HEIC and PDF images ·...
Kraken.io Image Optimizer and Compressor for JPG, PNG, WebP, GIF, SVG, AVIF, HEIC and PDF.
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https://heic-tojpg.com/heic-to-avif
Free HEIC to AVIF Converter – Fast, Secure & Online Tool
Convert HEIC to AVIF online for free. Get smaller file sizes and better image quality with no watermark. Works instantly in your browser — no software needed.
fast secure ampavif converter