Download Qt 4 [updated] -

You will typically need a compatible legacy compiler like MSVC 2010 or an older version of MinGW .

Downloading is often necessary for maintaining legacy software or porting older C++ projects to modern environments. Although Qt 4 was first released in 2005 and has been unsupported since 2015 , its source code and specific binaries remain available in official archives. Official Sources to Download Qt 4 download qt 4

Modern Linux distributions have removed Qt 4 from their official repositories. You will typically need a compatible legacy compiler

Get the qt-opensource-windows-x86-vs2010-4.8.7.exe or the MinGW version from the Qt 4.8.7 archive. Official Sources to Download Qt 4 Modern Linux

The final stable release of the series is Qt 4.8.7 . Specific Major Versions: Qt 4.8 Archive (Includes 4.8.7, 4.8.6, etc.). Qt 4.7 Archive . Qt 4.0 Archive (Original 2005 release files). Installation Guide by Platform

Run the installer and follow the wizard. After installation, you must manually add the Qt version to Qt Creator via Tools > Options > Build & Run > Qt Versions . 2. Linux (Ubuntu/Debian)