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Plantuml Web

Community Media and design

Web-based PlantUML frontend with PlantUML image generation and syntax validation.

Source code Documentation

What can you do with Plantuml Web?

  • generate_plantuml_image: Generate a diagram image from PlantUML code
  • validate_plantuml_syntax: Validate PlantUML code and return validation result

Install

The installation steps are in the documentation below. Documentation

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. plantuml_web
  2. Features
  3. Usage:
  4. Connecting to the MCP Server
  5. Testing the MCP Server
  6. Available MCP Tools

plantuml_web

Using nicegui as a PlantUML frontend, you can deploy PlantUML on an intranet.

It's a nicegui demo project with an added MCP (Model Context Protocol) server that exposes PlantUML functionality to AI assistants.

Plantuml jar version: plantuml-1.2025.3.jar

Features

Web Interface
  • Interactive PlantUML editor with live preview
  • Save and load diagrams
  • Responsive UI with resizable panels
MCP Server
  • Generate PlantUML diagrams in SVG or PNG format
  • Validate PlantUML code with detailed error messages

Usage:

With Docker
docker build -t plantuml_web_mcp .

# or pull from dockerhub
# docker pull  2niuhe/plantuml_web_mcp:latest

docker run -d -p 8080:8080 -p 8765:8765 plantuml_web_mcp:latest

Then you can access:

Without Docker
pip install -r requirements.txt
sh start.sh

The start script will launch:

  1. PlantUML server on port 8000
  2. Web interface on port 8080
  3. MCP server on port 8765

Connecting to the MCP Server

You can connect to the MCP server using any MCP client, such as Claude Desktop:

  1. Open Claude Desktop
  2. Go to Settings > MCP Servers
  3. Add a new server with the URL: http://localhost:8765/sse
  4. Restart Claude Desktop

Testing the MCP Server

A test client is provided to verify the MCP server functionality:

python test_plantuml_mcp.py http://localhost:8765/sse

Available MCP Tools

  • generate_plantuml_image: Generate a diagram image from PlantUML code
  • validate_plantuml_syntax: Validate PlantUML code and return validation result
ref

Home · zauberzeug/nicegui Wiki

How to use nicegui for beginners？ · zauberzeug/nicegui · Discussion #1486

Nicegui example and suggestions · zauberzeug/nicegui · Discussion #1778

NiceGUI

syejing/nicegui-reference-cn: NiceGUI 中文版本文档

(1) Use NiceGUI to watch images and do it from the COMMAND LINE! - YouTube

Frequently asked questions

What is Plantuml Web?

Web-based PlantUML frontend with PlantUML image generation and syntax validation.

How do I install Plantuml Web?

Follow the installation steps in its documentation, shown on this page and in its repository.

Is Plantuml Web open source?

Yes. Its code is on GitHub under the Apache-2.0 license.

Who maintains Plantuml Web?

It is published by 2niuhe. AI.tn lists it but does not maintain or endorse it.

From the community awesome-mcp-servers lists and the project's GitHub repository. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.