draw.io

Free online and offline diagramming tool for flowcharts, with a security-first, no-registration design.

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A free diagramming tool, draw.io lets users create flowcharts and technical diagrams online or offline without registration. It focuses on local control and privacy—supporting offline use, self-hosting, and Google Drive storage—making it suitable for engineers, architects, and students who need professional diagrams without a subscription or sending data to a vendor, rather than for teams that require real-time collaborative whiteboarding.

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