mermaid-js/mermaid-live-editor

Edit, preview and share mermaid charts/diagrams. New implementation of the live editor.

mermaid-js/mermaid-live-editor has 6.5k+ stars and 1k+ forks on GitHub, is written in TypeScript, and was last pushed on Oct 16, 2026. Data as of Oct 17, 17:31 UTC. Signed-in members get hourly updates — create a free account.

Summary Information

Updated 22 minutes ago

Type:ApplicationCategory(s):Documentation Tools Developer Tools

Added to GitGenius on September 9th, 2026

Created on November 21st, 2019

Open Issues & Pull Requests: 105 (+0)

GitHub issues: Enabled

Number of forks: 1,178

Total Stargazers: 6,862 (+0)

Total Subscribers: 52 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 8.3 days

Mean response time: 38.2 days

90th percentile: 88.6 days

Tracked items: 195

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Maintainer activity

1 person did triage or write work on this repository in the last 12 months.

Counts unlabeled, assigned, unassigned, milestoned, demilestoned, locked, unlocked over the last 12 months. These are issue and pull request events that require triage or write permission. Commits and code review are not counted. labeled and renamed are excluded because GitHub issue forms record the issue author as the actor. Figures from October 11, 2026. This count is not comparable across projects: each project's automation decides which of these events a person emits. How this is counted.

How this project is maintained

Roughly one issue in four opened in the past year never receives a reply. 100% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. 82% of issues opened in the past year have been closed, leaving a working backlog. Three people close 87% of everything that gets resolved.

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Issue Activity (beta)

Open issues: 42

New in 7 days: 3

Closed in 7 days: 2

Avg open age: 424 days

Stale 30+ days: 34

Stale 90+ days: 29

Recent activity

Opened in 7 days: 3

Closed in 7 days: 2

Comments in 7 days: 2

Events in 7 days: 8

Top labels

bug (148)
spam (56)
enhancement (19)
invalid (13)
retained (5)
help wanted (4)
Stale (3)
good first issue (3)

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Detailed Description

Mermaid Live Editor is a web application for editing, previewing, and sharing Mermaid diagrams in real time.

The tool addresses the need to create and collaborate on flowcharts, sequence diagrams, and Gantt charts without installing software. It provides a browser-based editor with live preview, allowing users to save diagrams as SVG files and generate shareable links for both viewing and editing. The editor can be deployed with Docker, with configurable build arguments to point to custom rendering services, Kroki instances for additional diagram types, analytics platforms, and Mermaid Chart integration.

The project suits teams and individuals who want a lightweight, self-hostable diagramming solution. It works well for organizations that need to embed diagram editing into their workflows or provide internal diagramming tools. The Docker deployment model makes it suitable for those who prefer to run services on their own infrastructure rather than relying on a hosted service.

Development activity shows consistent engagement with the codebase. The project maintains an active pull request review process, with automated deployment to preview environments for testing before merge. Releases are automated upon merging to the main branch, indicating a streamlined release pipeline. The maintainers actively invite community contributions and maintain communication channels for coordination.