Credits and licences
Image Shrinker runs entirely in your browser. These open-source projects do the heavy work. Thank you to their authors.
jSquash (AVIF, WebP, MozJPEG and OxiPNG codecs)
By Jamie Sinclair, repackaged from Google's Squoosh. Apache License 2.0. Source code. Licence text.
libheif and libheif-js (HEIC reader)
libheif by Dirk Farin and contributors, packaged for browsers by Kiril Vatev. GNU Lesser General Public License 3.0. The unchanged library is loaded as a separate file (/codecs/libheif.wasm), only when you open a HEIC photo, and you may replace it. libheif source code. libheif-js source code. libheif-js licence. Bundled libraries' licences.
Fonts and icons
Inter by Rasmus Andersson (SIL Open Font License). Material Symbols by Google (Apache License 2.0). Both are stored on this site, so no outside font server is used.