What is mermaidonline.live used for?

mermaidonline.live is a free online Mermaid.js editor that renders flowcharts, sequence and class diagrams live from text and exports them as SVG or PNG. It is a good fit for diagrams for technical documentation, and system design and workflow sketches.

How much does mermaidonline.live cost?

Paid plans for mermaidonline.live start at $99.90 as a one-time payment, and there is no free plan.

Is mermaidonline.live open source?

No. mermaidonline.live is proprietary (closed-source) software and can't be self-hosted. In the Developer Tools category, open-source options include Godot, Neovim and Vim.

What are some alternatives to mermaidonline.live?

mermaidonline.live competes with Eraser, Lucidchart and Whimsical.

mermaidonline.live: features, pricing and alternatives

About mermaidonline.live

Mermaid Online is a web editor for creating diagrams from Mermaid.js text syntax. You pick a template or write your own code, and the diagram renders automatically in a live preview beside the editor, which suits documentation, system design and workflow diagrams.

Templates cover flowcharts, sequence diagrams, class diagrams and pie charts, and the editor reports line and character counts. Finished diagrams can be exported as SVG or PNG, or copied to the clipboard in either format. A Diagram Agent adds an AI chat that creates diagrams from a description. The site has pricing and use-case pages and a sign-in, and links to the official Mermaid documentation for syntax help.

Key features

Live preview that renders as you type
Templates for flowcharts, sequence and class diagrams
Pie charts and other diagram types
Export to SVG and PNG
Copy SVG or PNG to the clipboard
AI diagram agent from text descriptions

Good fit for

Diagrams for technical documentation
System design and workflow sketches

Tags: mermaid; diagrams; flowchart; sequence-diagram; editor; svg; documentation

mermaidonline.live: questions and answers

What is mermaidonline.live used for?: mermaidonline.live is a free online Mermaid.js editor that renders flowcharts, sequence and class diagrams live from text and exports them as SVG or PNG. It is a good fit for diagrams for technical documentation, and system design and workflow sketches.
How much does mermaidonline.live cost?: Paid plans for mermaidonline.live start at $99.90 as a one-time payment, and there is no free plan.
Is mermaidonline.live open source?: No. mermaidonline.live is proprietary (closed-source) software and can't be self-hosted. In the Developer Tools category, open-source options include Godot, Neovim and Vim.
What are some alternatives to mermaidonline.live?: mermaidonline.live competes with Eraser, Lucidchart and Whimsical.