Flowchart Maker - Create Diagrams Online Free

About This Tool

The Trencada Flowchart Maker turns simple text into clean diagrams right in your browser. It uses the Mermaid syntax, the text-based diagram language trusted by developers and documentation teams, and renders a live preview while you type. No signup, no uploads and no design skills are needed.

Key Features

• Nine ready templates: flowchart, sequence, class, state, ER diagram, Gantt chart, pie chart, user journey and mindmap
• Live preview that updates as you type, with clear error messages when a line needs fixing
• Five themes: Default, Forest, Dark, Neutral and Base
• One-click export to PNG or SVG for documents, slides and wikis
• Runs fully in the browser, so your diagram text never leaves your device

How to Use

1. Pick a template or write Mermaid code in the editor
2. Watch the preview update, and adjust labels, arrows and layout in the text
3. Choose a theme that matches where the diagram will be used
4. Download the PNG or SVG, or copy the code into any tool that supports Mermaid

Because the code is plain text, diagrams stay easy to edit later, simple to share and perfect for version control.