PlantUML Diagrams: UML & C4 for Jira – Excalidraw

by Simplify

works with Jira Cloud

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SUPPORT: Partner Supported
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Installation

Key highlights of the appPlantUML diagrams on Jira issues: UML class, sequence and C4 from text, drawn inside Atlassian, on a whiteboard you can sketch on

watch PlantUML Diagrams: UML & C4 for Jira – Excalidraw video

UML from a few lines of text

Write a class, sequence, state or ER diagram as text and it appears on the issue. Change the text to change the model — no boxes to align by hand.

PlantUML and C4, drawn inside Jira

Write PlantUML with C4 built in and it lands on the whiteboard, next to your nomnoml and Mermaid models. No PlantUML server: everything is drawn inside Atlassian.

Models shared across the project

Keep the domain model on the project page, show it on every issue that touches it, start new diagrams from a copy, and roll back to any of the last 10 versions.

Supporting media

More details

PlantUML, C4 and UML for Jira teams:

Class, sequence, state and ER diagrams from Mermaid text; nomnoml syntax supported too
Excalidraw whiteboard around them: hand-drawn notes, images, shape libraries
PlantUML with C4 built in (no PlantUML server, no Java), plus Graphviz, LaTeX math, Vega-Lite charts and WaveDrom
Issue panel, project page and a global page with every diagram
Shared diagrams across issues, templates from a copy, last 10 versions kept
Conflict-safe saving; Jira permissions respected

Get started: open an issue → Apps → Excalidraw UML → draw, or choose Insert diagram and pick an example. Free for up to 10 users.

Runs on Atlassian Forge: stored in your site, rendered in the browser, no external calls.

Resources

App documentation
Comprehensive set of documentation from the partner on how this app works

Privacy and Security

Privacy and security questionnaire has been filled by the partner

Privacy policy

Atlassian's privacy policy is not applicable to the use of this app. Please refer to the privacy policy provided by this app's partner.

Partner privacy policy

Security program

This app is not part of the Marketplace Bug Bounty program.

Integration permissions

PlantUML Diagrams: UML & C4 for Jira – Excalidraw integrates with your Atlassian app

Version information

Version 2.18.0•for Jira Cloud

Release date: Nov 11th 2026
Summary: Minor version update
Details: Minor version update
Payment model: Paid via Atlassian
License type: Commercial