PlantUML Viewer

Notepad++ plugin to generate, preview and export PlantUML diagrams from any open document.

Pluginfree

PlantUML Viewer is a free Notepad++ plugin for generating, previewing, and exporting PlantUML diagrams directly from an open document. It renders diagrams in a dockable, zoomable panel with PNG/SVG export and dark mode support, requiring Java to be installed. It suits developers and technical writers who author PlantUML diagrams inside Notepad++ and want an in-editor preview instead of a separate tool.

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