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6 free tools to create flowcharts, sequence diagrams, ERDs, Gantt charts, mind maps, and class diagrams. Type simple text, get a professional diagram — export as PNG or SVG.
Create flowcharts from simple text. Define nodes and connections, get a professional diagram instantly. Export PNG or SVG.
Diagram ToolsCreate sequence diagrams showing interactions between systems. Define actors and messages, get a clean diagram.
Diagram ToolsCreate entity-relationship diagrams for database design. Define tables, columns, and relationships visually.
Diagram ToolsCreate Gantt charts for project timelines. Define tasks, durations, and dependencies — get a clean timeline view.
Diagram ToolsCreate mind maps from indented text. Central topic branches into subtopics — perfect for brainstorming and planning.
Diagram ToolsCreate UML class diagrams showing classes, attributes, methods, and relationships. Perfect for software design docs.
Free online diagram tools that run 100% in your browser. Create flowcharts, sequence diagrams, entity-relationship diagrams, Gantt charts, mind maps, and UML class diagrams by typing simple text — no drag-and-drop needed, no Lucidchart subscription required. Export as PNG or SVG for presentations, documentation, and wikis. Your data never leaves your device.
Type simple, human-readable text that describes your diagram — nodes, connections, relationships. The tool parses your text and renders a professional diagram instantly. Edit the text, and the diagram updates in real time. No mouse-dragging or pixel-pushing required.
Text-based diagrams are faster to create, easier to version-control (paste into Git), and simpler to update. Change one line of text instead of repositioning five boxes. They're the standard in software engineering documentation.