Nucleo

Nucleo provides a collection of over 40,000 premium SVG icons and a desktop application for browsing, customizing, and exporting them. Users can search the library, edit icon attributes such as color and size, and export assets in various formats for use in user‑interface designs, presentations, and print projects. The platform also offers React packages that make the icons readily available to developers working in that framework.

The software targets designers and developers who need a large, searchable set of icons and a tool to tailor them to specific projects. Its web and native Windows apps enable both online access and offline work, allowing users to integrate the icons into workflows without leaving the application. The focus is on managing icon libraries efficiently, including importing external sets, exporting customized versions, and converting between formats.

Nucleo is independently developed and has been maintained since 2014 by a small team in Italy. It is positioned as a stable, mature solution that has been adopted by thousands of design and development professionals.