Third-Party Code Used in Qt
Qt libraries and plugins can contain code that is not intellectual property of The Qt Company, but is available under specific open-source 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 acknowledge and comply with the licenses of the third-party components that you are actually shipping with your application. Click the name of the component to see the licensing details.
Third-party Licenses
The following sections list third-party components in Qt 6.9.0, grouped by Qt module. If the third-party component itself consists of parts that are of a different origin (so-called 4th-party or Nth-party code), these are listed, too.
Starting from Qt 6.8, Software Bill of Materials (SBOM) documents of third-party components in Qt are available. Information such as copyrights, licenses, versions, source repositories, and other relevant information are declared in SPDX 2.3 format. For more information, visit the Software Bill of Materials page.
Qt 3D
MIT License | |
MIT License or Public Domain | |
MIT License | |
BSD 3-clause "New" or "Revised" Licensee |
Qt 5 Core Compatibility APIs
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License | |
BSD 2-clause "Simplified" License |
Qt Bluetooth
GNU General Public License v2.0 only (This does not force user code to be GPL'ed. For more info see details.) |
Qt Core
Apache Tika MimeType Definitions, version 5101bc7fb090ed7deffe56837d7633c9485a1e5d | Apache License 2.0 |
BLAKE2 (reference implementation), version 54f4faa4c16ea34bcd59d16e8da46a64b259fc07 | Creative Commons Zero v1.0 Universal or Apache License 2.0 |
Zlib License | |
BSD 3-clause "New" or "Revised" License | |
Efficient Binary-Decimal and Decimal-Binary Conversion Routines for IEEE Doubles, version 3.3.0 | BSD 3-clause "New" or "Revised" License |
BSD-3-Clause | |
BSD-3-Clause | |
BSD-3-Clause | |
Public Domain | |
Public Domain | |
BSD 2-clause "Simplified" License | |
BSD 3-clause "New" or "Revised" License with PCRE2 binary-like Packages Exception | |
BSD 3-clause "New" or "Revised" License | |
Public Domain | |
Creative Commons Zero v1.0 Universal | |
Secure Hash Algorithm SHA-3 - brg_endian, version 4b9e13ead2c5b5e41ca27c65de4dd69ae0bac228 | BSD 2-clause "Simplified" License |
BSD 3-clause "New" or "Revised" License | |
Creative Commons Zero v1.0 Universal | |
MIT License | |
Unicode License Agreement - Data Files and Software (2016) | |
Unicode License v3 | |
BSD-3-Clause | |
BSD-3-Clause | |
BSD-3-Clause | |
MIT License |
Qt D-Bus
Academic Free License v2.1, or GNU General Public License v2.0 or later | |
Academic Free License v2.1, or GNU General Public License v2.0 or later |
Qt GUI
BSD 3-Clause "New" or "Revised" License | |
Freetype Project License or GNU General Public License v2.0 only | |
BSD 3-clause "New" or "Revised" License | |
D3D12 Memory Allocator, version f128d39b7a95b4235bd228d231646278dc6c24b2 | MIT License |
Bitstream Vera Font License | |
Apache License 2.0 | |
MIT License | |
MIT License and MIT Open Group variant | |
Zlib License | |
Freetype Project License or GNU General Public License v2.0 only | |
MIT License | |
Independent JPEG Group License and BSD 3-Clause "New" or "Revised" License | |
Libpng License and PNG Reference Library version 2 | |
MIT License | |
Mipmap generator for D3D12, version 0aa79bad78992da0b6a8279ddb9002c1753cb849 | MIT License |
Apache License 2.0 | |
MIT License | |
MIT License | |
MIT License | |
BSD 2-clause "Simplified" License and Imlib2 License | |
Apache License 2.0 or MIT License | |
MIT License | |
MIT License | |
LCS-Telegraphics License | |
X11 License and Historical Permission Notice and Disclaimer | |
MIT License | |
International Color Consortium License |
Qt Image Formats
Libtiff License | |
BSD 3-clause "New" or "Revised" License |
Qt Multimedia
GNU Lesser General Public License v2.1 or later and BSD 3-Clause "New" or "Revised" License and BSD 2-Clause "Simplified" License and BSD Source Code Attribution and ISC License and MIT License and Mozilla Public License 2.0 | |
Boost Software License 1.0 | |
Independent JPEG Group License | |
Zlib License |
Qt Network
The Public Suffix List, version 903a83ff7bfc3148e3692e09396f9f3bdc9462ef, fetched on 2024-06-05 | Mozilla Public License 2.0 |
BSD 3-clause "New" or "Revised" License |
Qt OPC UA
Mozilla Public License 2.0 and Creative Commons Zero v1.0 Universal and Creative Commons Attribution Share Alike 4.0 International and BSD 3-Clause "New" or "Revised" License and Apache License 2.0 and MIT License |
Qt PDF
Apache 2.0 | |
Custom license "inspired by the BSD, Artistic, and IJG (Independent | |
BSD | |
BSD 3-clause "New" or "Revised" License | |
MIT | |
MIT | |
IJG, BSD-3, Zlib | |
Libpng license | |
Zlib |
Qt Positioning
MIT License | |
Boost Software License 1.0 | |
Poly2Tri Polygon Triangulation Library, version commit a922022da4c0d3a55b1d6b6d634219caea653053 | BSD 3-clause "New" or "Revised" License |
Qt Qml
BSD 2-clause "Simplified" License |
Qt Quick 3D
MIT License | |
MIT License | |
Apache License 2.0 | |
MIT License | |
MIT License | |
BSD 3-clause "New" or "Revised" Licensee | |
Apache License 2.0 | |
BSD 3-clause "New" or "Revised" License | |
MIT License | |
MIT License |
Qt Quick 3D Physics
BSD 3-Clause "New" or "Revised" License |
Qt Quick Controls
MIT License |
Qt SQL
SQLite Blessing |
Qt SVG
Historical Permission Notice and Disclaimer - sell variant |
Qt Sensors
Apache License 2.0 |
Qt Shader Tools
SPIRV-Cross, version 2d990d355a296ae1e368585810f884ebadcc4773 | Apache License 2.0 and MIT Khronos - old variant |
BSD 3-Clause "New" or "Revised" License, and MIT Khronos - old variant, and Apache License 2.0, and GNU General Public License v3.0 or later with Bison exception 2.2, and AML glslang variant License |
Qt Spatial Audio
Mozilla Public License 2.0 and BSD 3-Clause "New" or "Revised" License | |
Apache License 2.0 | |
BSD 3-Clause "New" or "Revised" License |
Qt Test
Boost Software License 1.0 | |
MIT License | |
GNU General Public License v2.0 only with Linux Syscall Note | |
BSD 4-clause "Original" or "Old" License |
Qt Virtual Keyboard
Apache License 2.0 | |
Apache License 2.0 | |
Apache License 2.0 and BSD 3-clause "New" or "Revised" License |
Qt Wayland Compositor
MIT License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
GNU Lesser General Public License 2.1 or later | |
Wayland Linux Dmabuf Unstable V1 Protocol, version unstable v1, version 3 | MIT License |
Wayland Pointer Gestures Protocol, version unstable v1, version 2 | MIT License |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
HPND License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
MIT License | |
Wayland xdg-activation Protocol, version unstable v1, version 1 | MIT License |
Wayland xdg-decoration Protocol, version unstable v1, version 1 | MIT License |
MIT License | |
MIT License |
Qt WebEngine
Apache-2.0 | |
MIT | |
MPL 2.0 | |
Apache 2.0 | |
Acorn, a tiny, fast JavaScript parser written in JavaScript. | MIT |
BSD | |
BSD | |
Apache 2.0 | |
BSDish | |
MIT | |
Custom license | |
New BSD | |
Apache | |
BSD | |
MIT | |
MIT | |
Apache 2.0 | |
Apache 2.0 | |
Apache 2.0 | |
BSD 3-Clause | |
BSD | |
Apache 2.0 | |
MIT | |
MIT | |
Fiat-Crypto: Synthesizing Correct-by-Construction Code for Cryptographic Primitives | MIT |
Apache 2.0 | |
General Purpose FFT (Fast Fourier/Cosine/Sine Transform) Package | Custome license |
BSD | |
MIT | |
Apache 2.0 | |
New BSD | |
Apache License 2.0 | |
Apache License 2.0 | |
BSD-3 | |
BSD 3-Clause | |
BSD-3 | |
MIT | |
Apache License 2.0 | |
BSD | |
BSD | |
BSD | |
BSD | |
BSD-like | |
Apache2 | |
BSD | |
BSD | |
BSD | |
Apache-2.0 | |
BSD | |
BSD 3-Clause | |
New BSD | |
GNU Lesser Public License | |
BSD 3-clause "New" or "Revised" License | |
Apache License 2.0 | |
Apache 2.0 | |
MIT | |
Fdlibm license | |
MIT | |
BSD | |
MIT | |
Apache | |
BSD and LGPL v2 and LGPL v2.1 | |
BSD | |
BSD | |
BSD | |
Apache 2.0 | |
BSD, GPLv2 | |
BSD 3-Clause | |
2-Clause BSD | |
LGPL 2.1 | |
BSD | |
MIT | |
BSD | |
Apache 2.0 | |
MIT | |
MPL 1.1/GPL 2.0/LGPL 2.1 | |
MIT | |
BSD | |
BSD | |
BSD | |
BSD | |
New BSD | |
BSD | |
MIT | |
Apache 2.0 | |
2-Clause BSD | |
2-Clause BSD | |
BSD | |
Apache 2.0 | |
Libpng license | |
3-clause BSD | |
BSD | |
MIT | |
MIT | |
BSD | |
MIT and SGI Free Software B License Version 2.0 | |
BSD | |
BSD | |
BSD 3-Clause | |
Custom license | |
Public domain | |
MIT | |
MIT | |
Zlib |
Additional Information
The following table lists related documents, such as information about Trademarks and other licenses used in parts of Qt.
Provides additional information about the licensing of run-time dependencies of Qt for Android | |
University of Illinois/NCSA Open Source License, BSD licenses | |
Information about changes of licenses in Qt and Third Party Modules | |
BSD 3-clause "New" or "Revised" License | |
MIT License and Boost Software License 1.0 | |
Details of restrictions on the use of PDF-related trademarks | |
Qt package information in SPDX format | |
Commercial and BSD 3-clause "New" or "Revised" License. | |
Information about trademarks owned by The Qt Company. |
© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.