Markdown and Mermaid belong together. Markdown provides the explanation, while Mermaid turns relationships, flows, and sequences into diagrams that can live in the same source file. But many Markdown viewers show Mermaid as a plain code block. A Markdown viewer with Mermaid support should render the diagram alongside the surrounding text.
mdview.io is a Markdown viewer that supports Mermaid. Open a local .md file or paste Markdown into the browser, and Mermaid blocks render inline with headings, tables, code, and LaTeX math. That makes the result easier to review, share, and use as real technical documentation.
A Mermaid diagram starts as a fenced code block in the source:
```mermaid
flowchart LR
A[Client] --> B[API]
B --> C[(Database)]
```In a Mermaid-aware Markdown viewer, it becomes this:
The diagram remains close to the text that explains it, which is exactly why teams choose Markdown plus Mermaid for architecture notes, RFCs, runbooks, and incident reports.
Technical documents often mix several types of information. A reader may need a sequence diagram, the API example below it, and the rollout table after it. Sending people between a diagram tool and a Markdown file slows down review and makes documentation harder to maintain.
| Document need | Markdown viewer with Mermaid support |
|---|---|
| System overview | Render a flowchart in the document |
| Request flow | Show a sequence diagram beside the explanation |
| Data model | Display entity relationship diagrams |
| Project plan | Render timelines, states, and dependencies |
| AI-generated docs | Turn model-produced Mermaid source into usable visuals |
mdview.io supports this document-first workflow. Its Mermaid rendering keeps diagrams part of the page, with reading space for long technical documents and controls suited to dense diagrams.
AI assistants increasingly produce Mermaid diagrams as part of a design response or implementation plan. That is useful only if the next reader sees a diagram rather than syntax. The same is true for engineering documentation generated from scripts, CI workflows, or repositories.
With mdview.io, readers can open the rendered document without installing a Mermaid editor or configuring a Markdown extension. The source remains easy to version in a repository, while the viewer makes it easy to understand outside the editor.
Use mdview.io when you need to open Markdown with Mermaid, preview a generated diagram, or share an architecture document in a readable form. It renders the surrounding Markdown as well as the diagrams: tables, code blocks, task lists, and formulas all remain part of the same page.
For a Markdown viewer with Mermaid support, open your .md file in mdview.io and read the document the way its author intended.