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

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 "New" or "Revised" 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'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

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