Flowchart Maker & Online Diagram Software

Draw.io is a free online flowchart maker and diagram software that provides an intuitive drag-and-drop interface for creating professional diagrams. It supports flowcharts, org charts, UML diagrams, network diagrams, and technical architecture diagrams. The tool runs entirely in the browser, with diagrams stored locally or integrated with cloud services like Google Drive and OneDrive. A key differentiator is its extensive shape library, which includes generic shapes and specialized icons for AWS, Azure, and GCP cloud architectures. Unlike many tools, draw.io is completely free with no premium tiers, offering full functionality without cost. Its simplicity and zero learning curve allow rapid diagram creation without registrations or installations. Typical use cases include software architecture design, business process mapping, and educational diagramming. Target audiences range from developers and IT professionals to project managers and students who need quick, shareable diagrams. When used with cloud storage, the tool enables real-time collaboration. Originally launched as a standalone application, draw.io evolved into a web-based tool with open-source roots. It has become a go-to choice for technical documentation and whiteboard-style planning, trusted by millions globally for its reliability and cost-effectiveness.