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mmdc — CLI for mermaid, a diagram generation tool with a domain-specific language. A mermaid definition fil

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the mmdc command: CLI for mermaid, a diagram generation tool with a domain-specific language. A mermaid definition file is taken as input and a SVG, PNG, or PDF file is generated as output. More information: <http://mermaid.js.org/>.

Solution

mmdc — CLI for mermaid, a diagram generation tool with a domain-specific language. A mermaid definition file is taken as input and a SVG, PNG, or PDF file is generated as output. More information: <http://mermaid.js.org/>.

Convert a file to the specified format (automatically determined from the file extension):

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}}

Specify the theme of the chart:

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}} {{[-t|--theme]}} {{forest|dark|neutral|default}}

Specify the background color of the chart (e.g. lime, "#D8064F", or transparent):

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}} {{[-b|--backgroundColor]}} {{color}}

Code Snippets

Convert a file to the specified format (automatically determined from the file extension)

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}}

Specify the theme of the chart

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}} {{[-t|--theme]}} {{forest|dark|neutral|default}}

Specify the background color of the chart (e.g. `lime`, `"#D8064F"`, or `transparent`)

mmdc {{[-i|--input]}} {{input.mmd}} {{[-o|--output]}} {{output.svg}} {{[-b|--backgroundColor]}} {{color}}

Context

tldr-pages: common/mmdc

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