Licenses and source

What this site is built from, and where to get it.

libheif, under the LGPL 3.0

HEIC decoding is done by libheif, compiled to WebAssembly and distributed as libheif-js. It is licensed under the GNU Lesser General Public License, version 3.

The LGPL requires that you be able to replace the library with your own version. We have kept that straightforward: the module is not bundled into our code. It is served as two discrete, unmodified files, and the converter loads them by URL at runtime.

/wasm/libheif.js, the loader
/wasm/libheif.wasm, the compiled library
/wasm/LICENSE-libheif.txt, the full license text

Neither file has been altered from the published npm release. To substitute your own build, replace them at those paths and the converter will use yours instead.

fflate, under the MIT license

ZIP archives are assembled by fflate, in your browser. It is loaded only when you ask for a ZIP.

Everything else

The interface, the worker pool and the conversion pipeline are our own. There is no analytics script, no advertising script and no third party embed on this site.