JUCE (Jules’ Utility Class Extensions) is a widely used, open-source C++ framework designed for developing cross-platform audio applications. It enables developers to build software that runs on Windows, macOS, Linux, iOS, and Android with a single codebase. JUCE is especially popular in the music tech industry due to its powerful tools for creating audio plugins (VST, AU, AAX) and standalone applications. It offers a comprehensive set of classes for audio processing, MIDI handling, GUI design, and file I/O. JUCE also includes a Projucer tool that helps with project configuration and real-time code visualization. The framework is highly modular, allowing developers to include only the parts they need. Its real-time audio engine and support for modern UI make it ideal for digital audio workstations, synths, and effects processors. JUCE is widely adopted by professional developers and companies in the audio software industry.