Third-party licenses

Updated: 4 October 2026

FotoDrop uses open-source components to process HEIC/HEIF photos. Conversion takes place in your browser. The source photo and decoded pixels are not sent to a server for conversion.

HEIC WebAssembly decoder

• libheif 1.23.3, GNU LGPL v3
• libde265 1.1.1, GNU LGPL v3
• Wrapper code derived from @keeratita/heic-converter 0.4.1, MIT license

FotoDrop distributes a WebAssembly build based on specific source revisions. Corresponding source code, license texts, wrapper code, build manifest and rebuild/relink script are available without signing in:

• Build manifest and hashes
• libheif 1.23.3 source
• libde265 1.1.1 source
• Wrapper source
• Rebuild and relink script
• libheif: LGPL v3 / GPL v3
• libde265: LGPL v3 / GPL v3
• Wrapper MIT license

Written source-code offer

On request, we will provide any recipient of the component with complete corresponding source code and the materials needed to modify, rebuild and relink it, for no more than the reasonable cost of distribution. This offer remains valid for at least three years after the last distribution of this version.

Email [email protected] and mention “HEIC WASM 1.23.3”.

The libraries are provided without warranty under their respective licenses. These licenses do not change the license of FotoDrop's own application code.