Convert Mermaid to PNG or SVG

Paste Mermaid code and get an image for slides, docs, README files or chat. Flowcharts, sequence, class, state, ER and Gantt diagrams are drawn right on your device, and you see the picture before you download it.

Free forever · Runs on your device · 0 bytes uploaded

Choose a .mmd file or drop it here · never leaves this device

Mermaid code Save as PNG size Theme Transparent background

How to mermaid to Image

Paste your Mermaid code, or choose a .mmd or .md file.
Pick PNG or SVG, a size and a theme.
Click “Create image”, check the preview and download it.

Also good for

Mermaid to PNG
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Mermaid examples to start from

flowchart

flowchart TD
    Start([Order placed]) --> Pay{Paid?}
    Pay -->|Yes| Ship[Pack and ship]
    Pay -->|No| Remind[Send a reminder]
    Remind --> Pay
    Ship --> Done([Delivered])

sequenceDiagram

sequenceDiagram
    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 back

classDiagram

classDiagram
    class Customer {
      +String name
      +String email
    }
    class Order {
      +String id
      +Date placedAt
      +total() Number
    }
    Customer "1" --> "*" Order : places

erDiagram

erDiagram
    CUSTOMER ||--o{ ORDER : places
    ORDER ||--|{ LINE_ITEM : contains
    PRODUCT ||--o{ LINE_ITEM : "appears in"

gantt

gantt
    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, 4d

pie

pie title Where the week goes
    "Coding" : 45
    "Meetings" : 30
    "Reviews" : 15
    "Email" : 10

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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.

Which diagrams work?

Everything Mermaid can draw, including flowcharts, sequence, class, state, entity-relationship, Gantt, pie, mind map, timeline and Git graphs. If the code has a mistake, Mermaid’s own message tells you what to fix.

PNG or SVG?

SVG stays sharp at any size and is best for websites and design tools. PNG works everywhere, including Word, PowerPoint and chat apps; choose 2× or 4× for sharp slides and print.

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.