Mmdr – 1000x faster Mermaid rendering in pure Rust (no browser)
I was building a Rust-based agentic coding TUI and needed to render Mermaid diagrams. Noticed the official mermaid-cli spawns a full browser instance (Puppeteer/Chrome) just to render diagrams. Decided to fix this. mmdr is a native Rust renderer. No browser, no Node.js. mermaid-cli: ~3000ms per diagram mmdr: ~3ms per diagram Supports 13 diagram types: flowchart, sequence, class, state, ER, pie, gantt, timeline, journey, mindmap, git graph, XY chart, and quadrant.
In plain words
Mmdr is a Rust-based tool that renders Mermaid diagrams without requiring a browser or Node.js. It processes diagrams roughly 1000 times faster than the official mermaid-cli by eliminating the overhead of spawning Chrome instances. The tool supports 13 diagram types including flowcharts, sequence diagrams, state machines, Gantt charts, and mind maps. It is designed for developers building command-line applications or tools that need fast diagram rendering as a native component.
written from the facts on this page · September 2026
Does the same job
all alternatives →- FMFerrite – Markdown editor in Rust with native Mermaid diagram renderingJan 2026 · github.com · ▲241
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Line9 – A Mermaid rendering engine with its own layoutAug 2026 · line9.ai · ▲87Line9 is a new rendering engine for Mermaid flowchart diagrams that aims to remove the need for manual adjustment of layout. Mermaid is a popular text-based language for describing multiple types of diagrams. Several Mermaid rendering engines already exist. Most, like the original mermaid.js, use Dagre or ELK graph drawing libraries to automatically lay out their diagrams. I’ve used Mermaid for the past four years but often recreated my flowcharts in a diagram editor so that I could modify the layout to something that better suited my needs. Use Line9 when you want an automatic flowchart…
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