- Qt 6.7
- Qt WebEngine
- Qt WebEngine Licensing
- Qt 6.7.2 Reference Documentation

# Qt WebEngine Licensing

The Qt WebEngine module uses Chromium to provide most of its functionality. During the build process, Chromium becomes a part of the Qt WebEngine Core library. Therefore, when distributing Qt WebEngine, users need to comply to both the licenses of the Qt WebEngine part as developed under the Qt Project, as well as the licenses that are part of Chromium.

The Qt specific parts of the Qt WebEngine module are available under commercial licenses from The Qt Company. Alternatively, they are available under GNU Lesser General Public License v3.0, or GNU General Public License v3.0, or GNU General Public License v2.0.

The Chromium part contains code available under various licenses, with the most restrictive license being the GNU Lesser General Public License v2.1 (LGPL 2.1). For a full list, see Third-Party Licenses below.

## Complying with LGPL 2.1

The Qt Company allows commercial customers to distribute the source code of the Qt WebEngine module alongside the Qt WebEngine binaries, and allows recipients to customize and build Qt WebEngine from sources. This includes building and using such a modified Qt WebEngine with an application or system using an otherwise commercially licensed Qt.

The Qt Company also keeps the Qt specific parts of the Qt WebEngine module available under the GNU Lesser General Public License v3.0, or the GNU General Public License v3.0, or the GNU General Public License v2.0, even if WebEngine is released as part of a commercial-only Long-Term Support release (LTS, see also Long-Term Support releases).

## Third-Party Licenses

Third party licenses included in the sources as part of Chromium are found below.

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

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
FP16 | MIT
FXDiv | 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
Highway: C++ library for SIMD | Apache 2.0
Lighthouse | Apache License 2.0
Material color utilities | 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
Wuffs (Wrangling Untrusted File Formats Safely) | Apache 2.0
XNNPACK | BSD
Zstandard | BSD and GPLv2
cpuinfo | BSD
dav1d is an AV1 decoder :) | 2-Clause BSD
dynamic annotations | BSD
ffmpeg | LGPL 2.1
flac | BSD
fontconfig | MIT
google-glog&#x27;s symbolization library | BSD
harfbuzz-ng | MIT
hunspell | MPL 1.1/GPL 2.0/LGPL 2.1
icu | MIT
inspector protocol | BSD
ipcz | BSD
jsoncpp | MIT
libavif - Library for extracting metadata from .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
minigbm | BSD
modp base64 decoder | BSD
opus | BSD
pthreadpool | 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