draw.io
Free, open-source diagramming tool. Flowcharts, network diagrams, UML, floor plans. Works offline, saves to Google Drive/GitHub/local. Widely used in enterprises as a Visio alternative. Files stay in the .drawio XML format, so a diagram remains editable years later without the tool that made it.
draw.io opens in a browser tab — no download.
Not sure how to add draw.io to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
Own draw.io? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
How to install draw.io as a PWA
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