Mermaid Diagrams for Jira

by 9ByNight

works with Jira Cloud

Free app

OVERALL RATINGS
INSTALLS
SUPPORT: Unsupported
TRUST SIGNALS

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Overview

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Support

Installation

Key highlights of the appAuto-render Mermaid diagrams in Jira issue descriptions and comments — flowcharts, sequence diagrams, ERDs and 15+ more

Auto-render

Add a Mermaid code block to any issue description or comment. Diagrams appear in a dedicated panel next to your issue, no manual triggers, no configuration.

Full-screen view + dark mode

Open any diagram full-screen with zoom and pan to read every detail, plus one-click copy or download as SVG or PNG. Dark or light mode for the images follow your chosen Jira theme.

15+ diagram types

Flowcharts, sequence diagrams, ERDs, Gantt charts, class diagrams, state machines, mindmaps, and more — all the diagram types Mermaid supports, rendered the same way.

More details

Mermaid Diagrams brings diagrams-as-code to Jira. Add a mermaid code block to any issue description or comment, and it auto-renders as an interactive SVG in a dedicated panel.

Supports flowcharts, sequence/class/state diagrams (UML), ERDs, Gantt, pie charts, git graphs, mindmaps, architecture diagrams, and more.

Features:

Auto-detection — drop a code block, it renders
Works with Rovo: ask Rovo, paste the code block into a description or comment, the panel renders it
Auto refresh renders diagram changes automatically
Export as SVG or PNG
Theme-aware (light/dark mode)
Per-diagram error handling
Source view and full-screen mode

Privacy and security:

Runs entirely on Atlassian Forge
100% client-side — source never leaves Jira
Read-only permissions (read:jira-work)
No external API calls, no analytics, no tracking
Inherits SOC 2 Type II and GDPR from Forge

Support: contact@9bynight.com
Docs: https://www.9bynight.com/docs/mermaid-diagrams

Resources

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

Privacy and Security

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

Mermaid Diagrams for Jira integrates with your Atlassian app

Version information

Version 3.12.0•for Jira Cloud

Release date: Jul 6th 2026
Summary: Rendering reliability and print-clean output
Details: Editor groundwork and rendering polish
Diagrams in hidden or collapsed containers render the moment they become visible
Printed pages show just your diagrams — no app controls
Shared rendering engine updates from the editor release (Confluence companion app)
No new permissions — read-only access to Jira content, as always.
Payment model: Free
License type: Commercial - no charge