HEIC to JPG — open-source components

Astro (MIT)
https://github.com/withastro/astro

fflate (MIT)
https://github.com/101arrowz/fflate

libheif-js 1.23.2 (LGPL-3.0)
Unmodified browser bundle: /vendor/libheif-bundle.js
License: /vendor/libheif-LICENSE.txt
Source, release history and build instructions:
https://github.com/catdad-experiments/libheif-js
https://www.npmjs.com/package/libheif-js/v/1.23.2

libheif and compiled decoder components are distributed by libheif-js.
Upstream source and build instructions:
https://github.com/strukturag/libheif

Library distribution notices are retained in the browser bundle and the
licenses above. No ownership of these third-party components is claimed.