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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Privacy & Security

Support

Installation

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

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
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 3.2.0•for Jira Cloud

Release date: Apr 29th 2026
Summary: Initial release — render Mermaid diagrams in Jira issues, 15+ diagram types
Details: Initial public release. Mermaid Diagrams for Jira renders mermaid code blocks directly in your Jira issues — no setup required.
Features in 3.2.0:
Auto-detection of mermaid code blocks in issue descriptions and comments
Renders all major diagram types: flowcharts, sequence/class/state diagrams (UML), ERDs, Gantt, pie charts, git graphs, mindmaps, architecture, block, and Sankey diagrams
Export as SVG (vector) or PNG (1x or 2x)
Theme-aware rendering — adapts to Jira's light and dark mode
Smart per-diagram error handling with links to Mermaid documentation
Source view to toggle between rendered diagram and raw mermaid
Full-screen mode for navigating complex diagrams
Privacy and security:
Runs entirely on Atlassian Forge
100% client-side rendering — diagram source never leaves your Jira instance
Read-only permissions (read:jira-work)
No external API calls, no analytics, no tracking
Payment model: Free
License type: Commercial - no charge