draw.io
Free online diagramming tool for flowcharts, UML, network diagrams, and org charts. Works fully offline and integrates with cloud storage.
draw.io provides professional diagramming without sign-up or cloud lock-in. It supports flowcharts, UML diagrams, network topologies, org charts, and BPMN, with full offline capability and integration with Google Drive, OneDrive, and GitHub.
A common diagramming tool for engineers, architects, and technical writers. Use it to document system architectures, map database schemas, sketch API flows, and create presentation-ready diagrams for design reviews and RFCs.
URL
https://app.diagrams.net/Recommended tools
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