A free diagramming tool for flowcharts, UML, network and other diagrams.
draw.io is a browser-based diagram editor with shape libraries and several export formats. It can also be used as a desktop app.
No account is needed to start; files can be saved to your device or a connected storage service.
Yes, it supports common formats such as PNG, SVG and PDF.
Information and links are accurate as of the time of writing and may change. Always verify on the official site. This is an independent guide, not affiliated with the listed services.