Using a mirror cuts installation time from over two hours to just 5-8 minutes.
To compile without Qt Creator (using command line for clarity):
Once downloaded, double-click qt-opensource-windows-x86-5.15.2.exe to launch the wizard.
Since the is no longer officially distributed (Qt now requires account login for online installer), see: qt-opensource-windows-x86-5.15.2.exe
After this version, Qt Company shifted its LTS (Long Term Support) releases to a commercial-only model. That means:
Modern Qt online installers force users to log in with a registered Qt account. This specific offline executable allows complete installation without an internet connection or an active developer account. 2. Archival and Air-Gapped Environments
While Qt 5.15.2 is officially a Long-Term Support (LTS) release , that LTS support was primarily available for commercial license holders. For open-source users, the LTS benefits are limited. The official LTS period for open-source users ended when Qt 6 was released. However, Qt 5.15.2 remains a stable and widely used version. Using a mirror cuts installation time from over
In the "Select Components" screen, you must toggle the right filters to find 5.15.2: Install Qt creator 5.15.2 - Qt Forum
Can use the framework for free but must comply with the Qt Open Source Model , which generally requires sharing modifications to the Qt libraries themselves or providing source code for applications under GPL. How to Install Qt 5.15.2
: By version 5.15.2, the Qt 5 framework had reached peak maturity. It included refined modules for Qt Widgets That means: Modern Qt online installers force users
This article will dive into the history behind this file, explore why Qt 5.15.2 remains relevant, and provide a modern guide to accessing and installing this version for your own development projects.
During the installation, the online installer shows available Qt versions. Since 5.15.2 is outdated, it won’t appear by default. You need to select the option to access all historical releases, including Qt 5.15.2.
The standard approach involves the following steps:
The file is the final official offline installer for the open-source edition of the Qt 5.15.2 framework on Windows. Released by The Qt Company, this specific installer represents a major milestone for C++ and QML developers globally. It marks the transition point where Qt shifted from offering comprehensive offline setup files for open-source users to requiring an online, account-bound installation process.