Convert Mermaid to PNG
Paste Mermaid code and download a crisp PNG that drops straight into Word, PowerPoint, Google Docs, Notion or a chat. Choose 2× or 4× for high-resolution slides and print; everything is drawn on your device.
Free forever · Runs on your device · 0 bytes uploaded
How to mermaid to PNG
- Paste your Mermaid code, or choose a .mmd or .md file.
- Pick a size (2× is sharp on most screens) and a theme.
- Click “Create PNG”, check the preview and download it.
Also good for
- Mermaid to PNG converter
- export Mermaid diagram as PNG
- Mermaid PNG high resolution
- Mermaid diagram with transparent background
- Mermaid flowchart to PNG
Mermaid examples to start from
flowchartflowchart TD
Start([Order placed]) --> Pay{Paid?}
Pay -->|Yes| Ship[Pack and ship]
Pay -->|No| Remind[Send a reminder]
Remind --> Pay
Ship --> Done([Delivered])sequenceDiagramsequenceDiagram
participant U as User
participant A as App
participant S as Server
U->>A: Log in
A->>S: Check password
S-->>A: OK
A-->>U: Welcome backclassDiagramclassDiagram
class Customer {
+String name
+String email
}
class Order {
+String id
+Date placedAt
+total() Number
}
Customer "1" --> "*" Order : placeserDiagramerDiagram
CUSTOMER ||--o{ ORDER : places
ORDER ||--|{ LINE_ITEM : contains
PRODUCT ||--o{ LINE_ITEM : "appears in"ganttgantt
title Website launch
dateFormat YYYY-MM-DD
section Build
Design :a1, 2025-01-06, 5d
Development :a2, after a1, 10d
section Launch
Testing :after a2, 4dpiepie title Where the week goes
"Coding" : 45
"Meetings" : 30
"Reviews" : 15
"Email" : 10Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
Are my files uploaded anywhere?
No. Fizzdoc does the work inside your browser tab, using open-source engines compiled to WebAssembly and JavaScript. Your file is read from your device, processed locally, and the result is saved straight back to your device. You can check this yourself: open your browser’s developer tools, go to the Network tab, and run a job — no request carries your file.
How do I get a high-resolution PNG?
Choose 4× under PNG size. The diagram is drawn at four times its normal size, which stays sharp on large screens, in slides and in print.
Can the PNG have a transparent background?
Yes. Tick “Transparent background” to place the diagram on coloured slides or dark pages.
Is Fizzdoc free?
Yes, and it stays free: no sign-up, no watermark, no daily limit and no premium tier. Fizzdoc is open source under the Apache-2.0 license, so anyone can run their own copy.
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