Mermaid Editor

Mermaid live editor for diagrams in your browser

Use this Mermaid live editor to paste Mermaid syntax, render the diagram locally, and copy or export the result without uploading your source. It works for common Mermaid diagrams such as flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, and project planning visuals.

Common Mermaid editor workflows

• Preview diagrams before adding them to product specs, technical docs, or knowledge-base pages.
• Turn process notes, architecture flows, and roadmap sketches into readable Mermaid diagrams.
• Check Mermaid blocks before committing them to GitHub README files or Markdown documents.
• Export SVG or PNG versions when a document, slide deck, or issue tracker needs an image file.

Related tools

Mermaid live editor FAQ

Is this a live Mermaid editor?

Yes. You can write or paste Mermaid syntax, render it in the browser, and adjust the source until the preview matches the diagram you need.

Are Mermaid diagrams uploaded?

No. Mermaid source is rendered in your browser. BaseToolbox does not need to upload or store the diagram text for this tool to work.

Can I export Mermaid diagrams as images?

Yes. After rendering a diagram, you can copy the SVG or export an image version for docs, tickets, presentations, or design reviews.