Mermaid Diagrams for Jira
Render Mermaid flowcharts, sequence diagrams, ERDs, and more directly in Jira issues.
- 100% client-side
- Runs on Atlassian
- Read-only
- Free
Overview
A Forge-based Atlassian Marketplace app that detects Mermaid code blocks in any Jira issue description or comment and renders them as interactive SVG diagrams. No external services and no setup — diagrams render entirely in the browser, with no data leaving your Atlassian instance.
Features
- Renders flowcharts, sequence diagrams, ERDs, Gantt charts, state diagrams, mindmaps, and more
- Zero server dependencies — diagrams render in the browser using the Mermaid library
- Read-only access — never modifies issue data (scope: read:jira-work)
- Export or copy any diagram as SVG or PNG
- Runs on Atlassian — built on Forge, rendering entirely client-side; nothing leaves Atlassian infrastructure
- Free — no charge
Frequently Asked Questions
How do I add a diagram to a Jira issue?
Write a Mermaid code block (```mermaid) in any issue description or comment. The app detects it and renders the diagram automatically — there is nothing to configure.
Does my diagram data leave Jira?
No. Diagrams are rendered entirely in your browser using the Mermaid library. The app never communicates with any service outside Atlassian — no analytics, no tracking, and no data leaves your Atlassian instance.
Which diagram types are supported?
Everything Mermaid supports: flowcharts, sequence diagrams, entity-relationship diagrams, Gantt charts, state diagrams, class diagrams, mindmaps, pie charts, and more.
Can the app modify my issues?
No. It requests a single read-only scope (read:jira-work) and never writes to your issues.
How much does it cost?
Nothing — the app is free on the Atlassian Marketplace.
Further Reading
Try Mermaid Diagrams for Jira today
Built on Atlassian Forge — it runs entirely on Atlassian's cloud with no external servers and no data egress.