PlantUML SVG tool
Convert PlantUML to SVG online, preview the rendered diagram, and download a scalable SVG file without local setup.
PlantUML to SVG Converter
Edit PlantUML code, preview the diagram, and download SVG output.
Use this lightweight converter for SVG export. Open the full editor for AI generation, AI syntax repair, sharing, and saved projects.
Create scalable SVG diagrams from PlantUML text and move into OnUML when you need a complete editing workflow.
Paste PlantUML code, preview the rendered diagram, and download a SVG file from the browser.
Check the diagram output before downloading so syntax issues are easier to spot.
Render PlantUML without installing Java, Graphviz, or a desktop IDE extension.
Use the sample editor for fast diagram checks when you only need a single export.
Move to the full editor for AI generation, AI repair, sharing, and saved projects.
Keep conversion, preview, and export in one page without switching tools.
Use the converter for a quick export, then continue in OnUML when the diagram needs AI-assisted editing or collaboration.
Paste or edit PlantUML code in the source panel.
Wait for the diagram preview to render.
Click Download SVG to save the rendered diagram.
Open the full editor when you need AI repair, sharing, or a saved project.
This converter gives you the quick browser workflow first, then explains the practical export details developers usually need when choosing a diagram format.
If you use PlantUML locally, SVG export is usually handled with the SVG output flag. The browser converter is faster for one-off diagrams, while CLI export is better for repeatable documentation pipelines.
plantuml -tsvg diagram.pumlPlantUML servers render SVG through an encoded URL path. OnUML handles that encoding and preview workflow for you, so you can focus on the PlantUML source and download the final SVG.
/plantuml/svg/ENCODED_PLANTUML_SOURCESVG is a vector format, so PlantUML diagrams stay sharp in documentation sites, README files, design specs, and high-density displays. It is usually the better choice when text clarity and scaling matter.
Use SVG when diagrams need to live in web pages, architecture docs, or versioned documentation systems. The file remains readable at different sizes and works well for diagrams with many labels.
The sample code describes a simple conversion workflow. Edit it above, preview the result, and download the SVG file.
@startuml
actor User
participant "OnUML Converter" as Converter
participant "PlantUML Server" as Server
User -> Converter: Paste PlantUML code
Converter -> Server: Render diagram
Server --> Converter: Return export file
Converter --> User: Download diagram
@endumlUse these related tools when you need a different export format or a full PlantUML editing workflow.
Edit PlantUML online, preview diagrams, and continue into the full OnUML workspace.
Open PlantUML editorConvert PlantUML into a PNG image for slides, tickets, chat tools, and simple attachments.
Convert PlantUML to PNGUse AI generation, AI repair, sharing, and multi-format diagram editing in OnUML.
Open full editorSVG is ideal for documentation, websites, and diagrams that need to stay sharp at any size.
Turn PlantUML text into a downloadable SVG file without preparing a local PlantUML environment.
Adjust the source code and confirm the visual result before exporting the file.
Use the full OnUML editor when a quick conversion becomes a diagram that needs AI help or project history.
Paste PlantUML code into the editor, wait for the preview to render, and click Download SVG.
No. This page renders PlantUML through an online preview workflow, so you do not need Java, Graphviz, or a local extension.
Yes. The preview panel updates before export, which helps you check the rendered diagram and catch syntax issues.
Yes. AI repair is available in the full OnUML editor. This converter page is focused on quick preview and file export.
This page is optimized for one quick conversion. The full editor adds AI generation, syntax repair, sharing, saved projects, and support for Mermaid and draw.io.
Usually no. SVG contains the rendered drawing, not the original PlantUML source. Keep the PlantUML code if you need to edit the diagram later.
SVG scales without becoming blurry, which makes it better for documentation, websites, and diagrams with small text. PNG is better when you need a simple image attachment.
PlantUML can render supported diagram types as SVG. If the source has syntax errors or unsupported includes, fix the PlantUML code before exporting.
Use the full OnUML editor for AI diagram generation, syntax repair, sharing, and multi-format projects.
Open Full Editor