Free tool
Mermaid live editor
Paste Mermaid syntax from Claude, ChatGPT, or your own notes, and watch the diagram render as you type. Then copy the SVG or publish it as a shareable page.
A Mermaid live editor is an online tool that renders Mermaid’s text-based diagram syntax into a visual diagram as you type. Paste a flowchart, sequence diagram, or Gantt chart definition into the editor and the preview updates instantly. No install, no account, no build step.
Loading the Mermaid renderer…
For AI output
Your AI already writes Mermaid. This shows you the diagram
Claude and ChatGPT answer architecture, process, and planning questions in Mermaid syntax all the time: a wall of text that only becomes useful once it’s rendered. Paste it here to preview it as a real diagram, fix any syntax the model fumbled, and take away an SVG. If the diagram came out of a Claude artifact, you can publish the whole thing straight from Claude too.
How it works
From Mermaid syntax to a shareable diagram
Paste your Mermaid syntax
Drop in the diagram code your AI assistant produced: a flowchart, sequence diagram, Gantt chart, or any other Mermaid type. The preview renders as you type.
Fix what the parser flags
If a line breaks the diagram, the parse error appears inline while your last good render stays on screen. Adjust the syntax and the preview catches up in real time.
Copy, download, or publish
Copy the SVG to your clipboard, download it as a file, or publish the diagram as a page you can share. A clean link instead of a screenshot.
The next step
Turn the diagram into a page people can open
An online Mermaid preview gets you the picture. Pagelive gets it in front of someone: publish the diagram, alone or inside a doc or proposal, as a branded link that’s private by default and tells you when it was opened.
A link, not a screenshot
Publish the diagram as a page on a pagelive.site link. It stays sharp at any zoom, and you can update it without re-sending anything.
Private by default
Published pages are noindex by default, and you can add a password (encrypted so we can’t see it) when the diagram describes something confidential.
See who actually looked
View tracking shows opens, unique viewers, country, and time on page. Useful when the diagram is part of a proposal or architecture review.
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Open the tool →Mermaid editor FAQ
Mermaid is a text-based diagramming language: you describe a flowchart, sequence diagram, Gantt chart, or class diagram in plain text, and a renderer turns it into a visual diagram. Because it’s just text, AI assistants like Claude and ChatGPT generate it constantly. This editor turns that text into the actual picture.
Almost always a syntax error. Common culprits: a missing diagram type on the first line (e.g. flowchart TD), special characters like parentheses or brackets inside an unquoted node label (wrap the label in double quotes), or a malformed arrow. The editor shows the parser’s message inline: fix the flagged line and the preview updates within a moment.
Yes. Download the SVG from this editor and embed it in any document, slide, or site like a normal image. It scales without losing sharpness. If you want a living version, publish the diagram as a Pagelive page and link to it; update the page later and every existing link shows the new diagram.
Two ways. For a static copy, download the SVG and attach it. For a link, publish it with Pagelive: the diagram becomes a page on a clean pagelive.site URL that’s noindex by default, can be password-protected, and reports opens and time on page. Every new account starts with 14 days of the full plan, no card, then keeps 5 live pages free forever.
Stop screenshotting diagrams
Start with everything for 14 days, then keep 5 pages free forever. Founding is $7/mo (was $15) when you need custom domains and more. Every page noindex by default, password optional, opens tracked.