Add a Diagram to a README

Create diagrams GitHub renders natively in your README.

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Diagram code

Preview

Start typing to see your diagram…

💡 Write diagrams in Mermaid syntax — flowcharts, sequence diagrams, Gantt charts, class diagrams, and more — and export as SVG or PNG. Rendering happens entirely in your browser; nothing is uploaded.

GitHub tips

📖

GitHub renders Mermaid in Markdown — paste your code in a ```mermaid block and it shows inline.

🔧

Use this editor to get the syntax right with a live preview before committing.

🖼️

If you need an image instead, export SVG or PNG here.

🔒

Everything runs in your browser.

Como funciona

Inserir

Enter your data into the tool above. Everything stays local to your browser.

Processar

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Baixar

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Por que usar o nosso?

✓Completamente gratuito — sem custos ocultos, jamais

✓Sem conta, e-mail ou login necessário

✓Arquivos nunca saem do seu dispositivo

✓Sem limites de tamanho de arquivo

✓Sem marcas d'água em nenhuma saída

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🔀

Make a Flowchart

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↔️

Draw a Sequence Diagram

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📆

Build a Gantt Chart

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🧱

Create a Class Diagram

Diagram classes and their relationships for softwa

Perguntas frequentes

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