Licenses Used in Qt | Qt 5.14

Qt 5.14 | Licenses Used in Qt

Qt 5.14.1 Reference Documentation

# Licenses Used in Qt

Qt contains some code that is not provided under the GNU Lesser General Public License (LGPL) or the Qt Commercial License, but rather under specific licenses from the original authors.

The Qt Company gratefully acknowledges these and other contributions to Qt. We recommend that programs that use Qt also acknowledge these contributions, and quote these license statements in an appendix to the documentation.

Note: You only need to comply with (and acknowledge) the licenses of the third-party components that you are using with your application. Click the name of the component to see the licensing details.

Third-party Licenses

The following table lists parts (modules) of Qt that incorporate code licensed under third-party open-source licenses:

## Qt 3D

Open Asset Import Library, version 4.1.0 | BSD 3-clause "New" or "Revised" Licensee

## Qt Bluetooth

BlueZ | GNU General Public License v2.0 only (This does not force user code to be GPL'ed. For more info see details.)

## Qt Core

Data Compression Library (zlib), version 1.2.11 | Zlib License
Easing Equations by Robert Penner | BSD 3-clause "New" or "Revised" License
Efficient Binary-Decimal and Decimal-Binary Conversion Routines for IEEE Doubles, version 3.1.5 | BSD 3-clause "New" or "Revised" License
FreeBSD strtoll and strtoull, version 18b29f3fb8abee5d57ed8f4a44f806bec7e0eeff | BSD 3-clause "New" or "Revised" License
MD4 | Public Domain
MD5 | Public Domain
PCRE2 - Stack-less Just-In-Time Compiler, version 10.34 | BSD 2-clause "Simplified" License
PCRE2, version 10.34 | BSD 3-clause "New" or "Revised" License
QEventDispatcher on macOS | BSD 3-clause "New" or "Revised" License
Secure Hash Algorithm SHA-1 | Public Domain
Secure Hash Algorithm SHA-3 - Keccak, version 3.2 | Creative Commons Zero v1.0 Universal
Secure Hash Algorithm SHA-3 - brg_endian, version https://github.com/BrianGladman/sha/ commit 4b9e13ead2c5b5e41ca27c65de4dd69ae0bac228 | BSD 2-clause "Simplified" License
Secure Hash Algorithms SHA-384 and SHA-512 | BSD 3-clause "New" or "Revised" License
Text Codec: EUC-JP | BSD 2-clause "Simplified" License
Text Codec: EUC-KR | BSD 2-clause "Simplified" License
Text Codec: GBK | BSD 2-clause "Simplified" License
Text Codec: ISO 2022-JP (JIS) | BSD 2-clause "Simplified" License
Text Codec: Shift-JIS | BSD 2-clause "Simplified" License
Text Codec: TSCII | BSD 2-clause "Simplified" License
Text Codecs: Big5, Big5-HKSCS | BSD 2-clause "Simplified" License
The Public Suffix List, version 3bd641472776a5df4a8c6407da4a4846282cba94, fetched on 2019-10-23 | Mozilla Public License 2.0
TinyCBOR, version 0.6+patches | MIT License
Unicode Character Database (UCD), version 20 | Unicode License Agreement - Data Files and Software (2016)
Unicode Common Locale Data Repository (CLDR), version v36 | Unicode License Agreement - Data Files and Software (2016)
forkfd | MIT License

## Qt D-Bus

libdus-1 headers, version dbus-1.12.12 | Academic Free License v2.1, or GNU General Public License v2.0 or later

## Qt GUI

ANGLE Library, version chromium/3280 | BSD 3-clause "New" or "Revised" License
ANGLE: Array Bounds Clamper for WebKit | BSD 2-clause "Simplified" License
ANGLE: Murmurhash | Public Domain
ANGLE: Systeminfo | BSD 2-clause "Simplified" License
ANGLE: trace_event | BSD 3-clause "New" or "Revised" License
Adobe Glyph List For New Fonts, version 1.7 | BSD 3-Clause "New" or "Revised" License
Anti-aliasing rasterizer from FreeType 2 | Freetype Project License or GNU General Public License v2.0 only
Bitstream Vera Font, version 1.10 | Bitstream Vera Font License
Cocoa Platform Plugin | BSD 3-clause "New" or "Revised" License
DejaVu Fonts, version 2.37 | Bitstream Vera Font License
Freetype 2 - Bitmap Distribution Format (BDF) support | MIT License
Freetype 2 - Portable Compiled Format (PCF) support | MIT License
Freetype 2 - zlib | Zlib License
Freetype 2, version 2.10.1 | Freetype Project License or GNU General Public License v2.0 only
HarfBuzz | MIT License
HarfBuzz-NG, version 1.7.4 | MIT License
IAccessible2 IDL Specification, version 1.3.0 | BSD 3-clause "New" or "Revised" License
LibJPEG-turbo, version 2.0.3 | Independent JPEG Group License
LibPNG, version 1.6.37 | Libpng License and libpng License 2
MD4C, version 0.3.4 | MIT License
Native Style for Android | Apache License 2.0
OpenGL ES 2 Headers, version Revision 27673 | MIT License
OpenGL Headers, version Revision 27684 | MIT License
Pixman, version 0.17.12 | MIT License
Smooth Scaling Algorithm | BSD 2-clause "Simplified" License and Imlib2 License
Vulkan API Registry, version 1.0.39 | MIT License
Vulkan Memory Allocator, version 2.2.0 | MIT License
WebGradients | MIT License
Wintab API | Custom License
X Server helper | X11 License and Historical Permission Notice and Disclaimer
XCB | MIT License
sRGB color profile icc file | International Color Consortium License

## Qt Image Formats

TIFF Software Distribution (libtiff), version 4.1.0 | Libtiff License
WebP (libwebp), version 1.0.3 | BSD 3-clause "New" or "Revised" License

## Qt Location

Boost | Boost Software License 1.0
CSS Color Parser | MIT License
Clip2Tri Polygon Triangulation Library | MIT License
Clipper Polygon Clipping Library, version 6.4.0 | Boost Software License 1.0
Earcut | ISC License
Earcut Polygon Triangulation Library | ISC License
Mapbox GL Native | BSD 2-clause "Simplified" License
Poly2Tri Polygon Triangulation Library | BSD 3-clause "New" or "Revised" License
RapidJSON | MIT License
Vector Tile Library | ISC License
Wagyu Geometry Processing Library | MIT License
cURL Parse Date | MIT License
geojson-cpp | ISC License
geojson-vt-cpp | ISC License
geometry.hpp | ISC License
kdbush.hpp | ISC License
libc++ | MIT and UIUC (BSD-like)
nunicode | MIT License
polylabel | ISC License
protozero | BSD 2-clause "Simplified" License
shelf-pack-cpp | ISC License
supercluster.hpp | ISC License
tao_tuple | MIT License
unique_resource | Boost Software License 1.0
variant | BSD 3-clause "New" or "Revised" License

## Qt OPC UA

Open62541, version 0.3 | Creative Commons CCZero 1.0 Universal License
Open62541, version 1.0 | Mozilla Public License 2.0

## Qt Purchasing

Base64 Decoder | Apache License 2.0
In-app billing service | Apache License 2.0
Public Key Verification | Apache License 2.0

## Qt QML

JavaScriptCore Macro Assembler | BSD 2-clause "Simplified" License

## Qt Quick 3D

Open Asset Import Library, version 5.0.0-rc | BSD 3-clause "New" or "Revised" Licensee

## Qt Quick Controls

Shadow values from Angular Material | MIT License

## Qt SQL

SQLite, version 3.30.1 | Public Domain

## Qt SVG

XSVG | MIT "Old Style" License

## Qt Script

JavaScriptCore, version Snapshot from 2011-01-27 | GNU Library General Public License v2 or later

## Qt Test

Cycle | MIT License
Linux Performance Events, version 3.7 | GNU General Public License v2.0 only with Linux Syscall Note
Valgrind, version 3.14.0 | BSD 4-clause "Original" or "Old" License

## Qt Virtual Keyboard

Lipi Toolkit, version 4.0.0 | MIT License
OpenWnn | Apache License 2.0
PinyinIME | Apache License 2.0
Traditional Chinese IME (tcime) | Apache License 2.0 and BSD 3-clause "New" or "Revised" License

## Qt Wayland Compositor

Wayland EGLStream Controller Protocol | MIT License
Wayland Fullscreen Shell Protocol, version unstable v1 | MIT License
Wayland IVI Extension Protocol, version 1.9.1 | MIT License
Wayland Linux Dmabuf Unstable V1 Protocol | MIT License
Wayland Primary Selection Protocol, version 1 | MIT License
Wayland Protocol, version 1.16.0 | MIT License
Wayland Scaler Protocol, version 2 | MIT License
Wayland Text Input Protocol | HPND License
Wayland Viewporter Protocol, version 1 | MIT License
Wayland XDG Output Protocol, version unstable v1, version 2 | MIT License
Wayland XDG Shell Protocol, version 1.9.0 | MIT License
Wayland xdg-decoration Protocol, version unstable v1, version 1 | MIT License

## Qt WebEngine

ANGLE array bounds clamper from WebKit | {{license-type}}
ARCore SDK | {{license-type}}
ARCore SDK client library for Chrome | {{license-type}}
AXE-CORE Accessibility Audit | {{license-type}}
Abseil | {{license-type}}
Alliance for Open Media Video Codec | {{license-type}}
Almost Native Graphics Layer Engine | {{license-type}}
Android Explicit Synchronization | {{license-type}}
Blackmagic DeckLink SDK - Mac | {{license-type}}
BoringSSL | {{license-type}}
Breakpad, An open-source multi-platform crash reporting system | {{license-type}}
Brotli | {{license-type}}
CRC32C | {{license-type}}
Chrome Custom Tabs - Example and Usage | {{license-type}}
Chromium License | BSD
Chromium OS system API | {{license-type}}
CityHash | {{license-type}}
Cocoa extension code from Camino | {{license-type}}
Compact Encoding Detection | {{license-type}}
Compact Language Detector v3 | {{license-type}}
Crashpad | {{license-type}}
Darwin | {{license-type}}
David M. Gay's floating point routines | {{license-type}}
Dawn | {{license-type}}
Emoji Segmenter | {{license-type}}
Expat XML Parser | {{license-type}}
Feed | {{license-type}}
Fiat-Crypto: Synthesizing Correct-by-Construction Code for Cryptographic Primitives | {{license-type}}
FlatBuffers | {{license-type}}
Flot Javascript/JQuery library for creating graphs | {{license-type}}
FreeType | {{license-type}}
Fuchsia NDK | {{license-type}}
GVR Android SDK | {{license-type}}
GifPlayer Animated GIF Library | {{license-type}}
Google Ink | {{license-type}}
IAccessible2 COM interfaces for accessibility | {{license-type}}
ISimpleDOM COM interfaces for accessibility | {{license-type}}
Jinja2 Python Template Engine | {{license-type}}
Khronos header files | {{license-type}}
Khronos reference front-end for GLSL and ESSL | {{license-type}}
LZMA SDK | {{license-type}}
LevelDB: A Fast Persistent Key-Value Store | {{license-type}}
Lottie Web | {{license-type}}
Material Design Icons | {{license-type}}
Metrics Protos | {{license-type}}
NVIDIA Management Library | {{license-type}}
NVidia Control X Extension Library | {{license-type}}
Netscape Portable Runtime (NSPR) | {{license-type}}
Netwide Assembler | {{license-type}}
Network Security Services (NSS) | {{license-type}}
OTS (OpenType Sanitizer) | {{license-type}}
Oculus SDK for Windows | {{license-type}}
One Euro Filter | {{license-type}}
Open Screen Protocol Library | {{license-type}}
OpenH264 | {{license-type}}
OpenVR SDK | {{license-type}}
PDFium | {{license-type}}
PFFFT: a pretty fast FFT. | {{license-type}}
PLY (Python Lex-Yacc) | {{license-type}}
Paul Hsieh's SuperFastHash | {{license-type}}
Perfetto | {{license-type}}
Polymer | {{license-type}}
Protocol Buffers | {{license-type}}
Quick Color Management System | {{license-type}}
Recurrent neural network for audio noise reduction | {{license-type}}
SMHasher | {{license-type}}
SPIR-V Headers | {{license-type}}
SPIR-V Tools | {{license-type}}
Shaderc | {{license-type}}
Skia | {{license-type}}
Snappy: A fast compressor/decompressor | {{license-type}}
Strongtalk | {{license-type}}
Sudden Motion Sensor library | {{license-type}}
SwiftShader | {{license-type}}
The Chromium Project | {{license-type}}
The USB ID Repository | {{license-type}}
URI Template Parser | {{license-type}}
UnRAR source for decompressing .RAR and other files. | {{license-type}}
V8 JavaScript Engine | {{license-type}}
WDS | {{license-type}}
Web Animations JS | {{license-type}}
WebKit | {{license-type}}
WebM container parser and writer. | {{license-type}}
WebP image encoder/decoder | {{license-type}}
WebRTC | {{license-type}}
Windows Template Library (WTL) | {{license-type}}
bspatch | {{license-type}}
d3 | {{license-type}}
dav1d is an AV1 decoder :) | {{license-type}}
dom-distiller-js | {{license-type}}
dynamic annotations | {{license-type}}
enum34 | {{license-type}}
fdlibm | {{license-type}}
ffmpeg | {{license-type}}
flac | {{license-type}}
fontconfig | {{license-type}}
gestures | {{license-type}}
google-glog's symbolization library | {{license-type}}
google-jstemplate | {{license-type}}
iccjpeg | {{license-type}}
icu | {{license-type}}
inspector protocol | {{license-type}}
jsoncpp | {{license-type}}
libaddressinput | {{license-type}}
libcxx-pretty-printers | {{license-type}}
libevdev | {{license-type}}
libevent | {{license-type}}
libjingle XMPP and xmllite libraries | {{license-type}}
libjpeg | {{license-type}}
libjpeg-turbo | {{license-type}}
libpng | {{license-type}}
libprotobuf-mutator | {{license-type}}
libsecret | {{license-type}}
libsrtp | {{license-type}}
libudev | {{license-type}}
libusbx | {{license-type}}
libvpx | {{license-type}}
libxml | {{license-type}}
libxslt | {{license-type}}
libyuv | {{license-type}}
linux-syscall-support | {{license-type}}
mesa_headers | {{license-type}}
minigbm | {{license-type}}
modp base64 decoder | {{license-type}}
nmoinvaz/minizip | {{license-type}}
opus | {{license-type}}
pyjson5 | {{license-type}}
re2 - an efficient, principled regular expression library | {{license-type}}
sfntly | {{license-type}}
simplejson | {{license-type}}
sqlite | {{license-type}}
tcmalloc | {{license-type}}
test_fonts | {{license-type}}
tlslite | {{license-type}}
url_parse | {{license-type}}
usrsctp | {{license-type}}
v4l-utils | {{license-type}}
valgrind | {{license-type}}
woff2 | {{license-type}}
xdg-mime | {{license-type}}
xdg-user-dirs | {{license-type}}
xdg-utils | {{license-type}}
xxHash | {{license-type}}
yasm | {{license-type}}
zlib | {{license-type}}

## Qt XML Patterns

XML Schema, version 2007/08 | W3C Software Notice and Document License (2015-05-13)

## Additional Information

The following table lists related documents, such as information about Trademarks and other licenses used in parts of Qt.

Android GNU C++ Run-time Licensing | Provides additional information about the licensing of run-time dependencies of Qt for Android
LLVM Attribution | University of Illinois/NCSA Open Source License, BSD licenses
License Changes | Information about changes of licenses in Qt and Third Party Modules
Macros for Building with CMake | BSD 3-clause "New" or "Revised" License
Mesa llvmpipe | MIT License
Notes about PDF Licensing | Details of restrictions on the use of PDF-related trademarks
Open Source Licensing of Qt | Information about open source licensing of Qt.
The Active Qt framework | Commercial and BSD 3-clause "New" or "Revised" License.
The QtOpenGLExtensions Library | Commercial and BSD 3-clause "New" or "Revised" License.
The qtmain Library | Commercial and BSD 3-clause "New" or "Revised" License.
Trademarks | Information about trademarks owned by The Qt Company and other organizations.