libheif.js — the HEIC decoder used by this site

What it is
  libheif 1.23.5 and libde265 1.1.3, compiled to WebAssembly (embedded in
  this one JavaScript file), unmodified. Decode-only, HEVC only: no
  encoders, no AV1, no uncompressed codec, no plugins.

  It runs in a Web Worker in your browser, only when you choose a HEIC
  photo. Your photo is never uploaded; nothing on this site can receive it.

Licences
  libheif: GNU Lesser General Public License v3 — see COPYING-libheif
  libde265: GNU Lesser General Public License v3 — see COPYING-libde265

  Both are used unmodified and loaded as this separate file, which you may
  replace with your own build of the same libraries.

Source
  https://github.com/strukturag/libheif/releases/tag/v1.23.5
    libheif-1.23.5.tar.gz  sha256 fd9036064c4432f0550d15072ddf34956a248279ee9aeaff0fba3fa0f77d8f1a
  https://github.com/strukturag/libde265/releases/tag/v1.1.3
    libde265-1.1.3.tar.gz  sha256 554228bd17788c99a7e63b37ab5634722190e6e2bf60c1dcb01cef328e133905

  Built with Emscripten 6.0.10 by tool/build_libheif_wasm.sh in the
  PortalPrep repository (every build flag is in that script).

  libheif.js  sha256 2f4841f19b37ae9d62cafb91027d072aea9d88575aeb56eaf968942aaa1d0870