About FreeDiagramKit
Free online diagram toolkit that respects your privacy. Every diagram is rendered in your browser — your data never leaves your device.
5
Diagram Tools
2
Export Formats
0
Sign-ups Required
0
Data Sent to Server
Our Tools
Flowchart Builder
Drag-and-drop flowchart editor with process, decision, start/end, and I/O nodes.
Mind Map
Central topic with branching nodes, color-coded branches, and expand/collapse.
Org Chart
Hierarchical organization chart with person cards, department colors, and auto-layout.
Sequence Diagram
Text-based input for UML sequence diagrams with lifelines and arrows.
Gantt Chart
Project timeline with task bars, categories, today marker, and weekend shading.
Privacy & Security
100% Browser-Based
All rendering uses HTML5 Canvas. No data is sent to any server.
Instant Rendering
Canvas-based rendering for smooth, fast diagram creation and editing.
Works Everywhere
Use on any device with a modern browser — desktop, tablet, or phone.