# PlantUML Visualizer

> A Chrome / Firefox extension for visualizing PlantUML descriptions.

Canonical page: [https://chrome-stats.com/d/plantuml-visualizer](https://chrome-stats.com/d/plantuml-visualizer)

## Overview

- **ID:** `plantuml-visualizer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** WillBooster Inc.
- **Category:** web-development,appearance
- **Daily users:** 324
- **Weekly downloads:** 3
- **Rating:** 5.00 / 5 (4 ratings)
- **Version:** 2.0.3
- **Last updated:** 2023-05-21
- **First published:** 2019-05-17
- **Size:** 428 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/plantuml-visualizer/)
- **Website:** [https://github.com/WillBooster/plantuml-visualizer](https://github.com/WillBooster/plantuml-visualizer)

## Description

PlantUML Visualizer is a powerful Chrome and Firefox extension designed to transform PlantUML descriptions into clear, visual diagrams directly within your browser. It supports rendering diagrams on various platforms and contexts such as GitHub file viewers, issues, pull requests, and README files, as well as any page containing preformatted PlantUML code blocks.

Additionally, it supports visualization of `.pu`, `.puml`, and `.plantuml` files, including GitHub raw files (Chrome only) and local files, making it a versatile tool for developers and engineers who frequently work with UML diagrams. The source code and further documentation are available on GitHub, ensuring transparency and community collaboration.

## Rankings

- #6,404 — Overall
- #78 — plan
- #147 — pull
- #178 — ali
- #249 — size

## Permissions and access

### Permissions

- `https://*/*`
- `http://*/*`
- `storage`

### Content script matches

- `*`
- ``

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/plantuml-visualizer)