Open-source notices
Trovfolio uses open-source software. Some of it is licensed under the GNU Lesser General Public License, version 3 (LGPL-3.0). We use these components without modification, and they load as separate files, so you can replace them with your own versions.
Last updated: October 28, 2026 · Operated by Fist Bump Labs, LLC ("Trovfolio," "we," "us")heic-to
heic-to converts HEIC and HEIF photos to JPEG in your browser when you add one to an item. It bundles libheif and libde265 (below), compiled to JavaScript, and Trovfolio loads it on demand as a separate script file.
- Version: 1.6.6
- Copyright: the project names Hopper Gee as its author. Its LICENSE file carries no copyright line and reads: "heic-to is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version."
- License: LGPL-3.0
- Source: heic-to v1.6.6 on GitHub · our copy, heic-to-1.6.6.tar.gz, 6.3 MB
libheif
libheif reads the HEIF container that HEIC photos use. heic-to 1.6.6 is built from libheif 1.23.6.
- Version: 1.23.6
- Copyright: Copyright (c) 2017-2020 Struktur AG · Copyright (c) 2017-2026 Dirk Farin
- License: LGPL-3.0 for the library. Its sample applications and its Go and C++ wrappers are MIT-licensed and are not part of Trovfolio.
- Source: libheif v1.23.6 on GitHub · our copy, libheif-1.23.6.tar.gz, 2.4 MB
libde265
libde265 decodes the HEVC (H.265) image data inside a HEIC photo. The libheif build in heic-to 1.6.6 uses libde265 1.0.16.
- Version: 1.0.16
- Copyright: Copyright (c) 2013-2014 Struktur AG · Copyright (c) 2013-2024 Dirk Farin
- License: LGPL-3.0 for the library. Its sample applications are MIT-licensed and are not part of Trovfolio.
- Source: libde265 v1.0.16 on GitHub · our copy, libde265-1.0.16.tar.gz, 0.8 MB
License texts
- GNU Lesser General Public License, version 3 (LGPL-3.0)
- GNU General Public License, version 3 (GPL-3.0). The LGPL-3.0 is written as a set of extra permissions on top of the GPL-3.0, so the two texts are read together.
Request the source
Fist Bump Labs, LLC will send you a copy of the source code for any of these components, at the versions listed above, if you ask through our contact form.