A wireframe tool is a software application or online platform to create wireframes, visual representations of the skeleton structure, and a digital product or user interface layout. These tools offer a variety of features and functionalities to help with the construction of wireframes for online and mobile applications.

Wireframe tools provide an easy interface and selection of pre-built UI components and templates, allowing designers to create wireframes quickly and efficiently. In addition, they often have drag-and-drop capability, allowing for simple element placement and layout.