This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.



Merpress lets you create diagrams and visualizations using MermaidJS.


  • Open the block by typing "/MermaidJS" (or use the sidebar and search)
  • Until there is a valid Mermaid diagram, there will be a syntax error in the graph.
  • When editing the block, there are 2 views. Use the upper area for writing, and the lower for displaying the diagram.
  • When the block is not selected, it will be displayed as it should be seen on the site.
  • As seen on my test site.


This plugin provides 1 block.

  • MermaidJS


Can you make diagrams with this?

Yes. Checkout MermaidJS for syntax reference and example diagrams.


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Contributors & Developers

“merpress” is open source software. The following people have contributed to this plugin.


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Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Update mermaid to 9.3.0.