- Qt 6.5
- Qt WebEngine
- Qt WebEngine Licensing
- Qt 6.5.3 Reference Documentation

# Qt WebEngine Licensing

The Qt specific parts of the Qt WebEngine module are dual-licensed under Commercial and GNU Lesser General Public License (LGPLv3). In addition, the module contains code licensed under LGPLv2.

The module includes a snapshot of Chromium. As such, users need to respect the licenses of Chromium, and third-party code included in Chromium. The arguably most restrictive license to be respected by all users is LGPLv2.1.

Note: Any GPL licenses listed below are only used to access Linux system resources. Qt WebEngine does not link to nor distribute GPL binary code, and it does not affect users of Qt WebEngine.

Third party licenses included in the sources are:

AXE-CORE Accessibility Audit | MPL 2.0
Abseil | Apache 2.0
Alliance for Open Media Video Codec | BSD
Almost Native Graphics Layer Engine | BSD
Android Explicit Synchronization | Apache 2.0
BoringSSL | BSDish
Brotli | MIT
CRC32C | New BSD
Chromium License | BSD
CodeMirror 6 | MIT
Compact Encoding Detection | Apache 2.0
Compact Language Detector v3 | Apache 2.0
Crashpad | Apache 2.0
Dawn | Apache 2.0
Devtools-Frontend | BSD
Emoji Segmenter | Apache 2.0
Expat XML Parser | MIT
Fiat-Crypto: Synthesizing Correct-by-Construction Code for Cryptographic Primitives | MIT
FlatBuffers | Apache 2.0
Google Double Conversion | BSD
Headers for the Windows 10 WebAuthn API (webauthn.dll) | MIT
Lighthouse | Apache License 2.0
NVidia Control X Extension Library | MIT
OTS (OpenType Sanitizer) | BSD
One Euro Filter | BSD
PDFium | BSD
PFFFT: a pretty fast FFT. | BSD-like
Perfetto | Apache2
Protocol Buffers | BSD
Recurrent neural network for audio noise reduction | BSD 3-Clause
Snappy: A fast compressor/decompressor | New BSD
The Chromium Project | BSD 3-clause &quot;New&quot; or &quot;Revised&quot; License
The Incremental Distributed Point Functions library | Apache 2.0
V8 fork of fdlibm | fdlibm license
Volk Meta loader for Vulkan API | MIT
Vulkan Deps | BSD
VulkanMemoryAllocator | MIT
WebKit | BSD and LGPL v2 and LGPL v2.1
WebM container parser and writer. | BSD
WebP image encoder/decoder | BSD
WebRTC | BSD
Windows Template Library (WTL) | Microsoft Permissive License
Wuffs (Wrangling Untrusted File Formats Safely) | Apache 2.0
cpuinfo | BSD
dav1d is an AV1 decoder :) | 2-Clause BSD
dynamic annotations | BSD
ffmpeg | LGPL 2.1
fontconfig | MIT
google-glog&#x27;s symbolization library | BSD
harfbuzz-ng | MIT
hunspell | MPL 1.1/GPL 2.0/LGPL 2.1
iccjpeg | Custom license
icu | MIT
inspector protocol | BSD
ipcz | BSD
jsoncpp | MIT
libavif - Library for encoding and decoding .avif files | 2-Clause BSD
libevent | BSD
libgav1 | Apache 2.0
libpng | libpng license
libsrtp | 3-clause BSD
libvpx | BSD
libxml | MIT
libxslt | MIT
libyuv | BSD
mesa_headers | MIT and SGI Free Software B License Version 2.0
modp base64 decoder | BSD
opus | BSD
re2 - an efficient, principled regular expression library | BSD 3-Clause
sqlite | Public domain
woff2 | MIT
xdg-mime | Academic Free License version 2.0 or LGPL v2
xdg-user-dirs | MIT
zlib | Custom license