A wireframe is a diagram or blueprint for a web page, mobile app, or other digital interface that serves as the first idea - the minimalist outline - of things like mobile apps, landing pages, and websites. Designers use basic shapes like rectangles and lines to indicate what will later turn into complex elements like images, text blocks, and interactive buttons. There are several wireframe tools available, each with its own strengths and weaknesses. Some popular options include Sketch for detailed, vector-based design, Moqups for beginners, Figma for a free wireframe app, UXPin for handing off design documentation to developers, MockFlow for project organization, Justinmind for realistic, interactive wireframes, and Uizard for AI-assisted wireframing. When choosing the best wireframe software for you and your team, consider your design process and goals, such as collaboration, responsiveness, and prototyping capabilities. A combination of tools may be necessary to achieve a smooth design process.