Open-source licences

BoltDeck’s tools are built with open-source software written by generous people around the world. Thank you! This page lists the parts that run in your browser when you use a tool, and the licence each one is shared under.

Open source used by the tools

Software	Used for	Licence
libheif and libde265	Opening iPhone HEIC photos in the image converter	LGPL-3.0
libheif-js 1.23.5	The WebAssembly build of libheif	LGPL-3.0
pdf-lib	Making PDF files (invoice generator, Image to PDF)	MIT
qrcode	Making QR codes	MIT
fflate	ZIP downloads	MIT
React	The interactive parts of some tools	MIT
Astro	Building the website	MIT

About the HEIC decoder (LGPL)

The HEIC decoder is shared under the GNU Lesser General Public License, version 3 (LGPL-3.0). We use it unchanged, exactly as published in libheif-js version 1.23.5, which is built from libheif-emscripten v1.23.5.

• It’s kept as its own files (a small JavaScript loader and libheif.wasm), which your browser downloads only when you convert a HEIC photo. You’re free to replace them with your own build of the library.
• The full licence texts (LGPL-3.0, and the GPL-3.0 it builds on) are here: libheif licence.
• The source code is available from the links above. If you’d like us to send you the exact source code we use, email boltdeck@digiform.no.

Like everything else on BoltDeck, the decoder runs entirely on your device. Your photos are never uploaded.