Best diagramming tools
Tools for creating flowcharts, architecture diagrams, wireframes, and visual documentation.
Diagramming tools help teams visualize systems, processes, and ideas. They range from freeform whiteboards to structured diagram editors, and from text-based tools for developers to visual editors for everyone else.
The market splits between developer-friendly tools (Mermaid, Eraser) that define diagrams as code, visual editors (Lucidchart, Draw.io) for traditional diagramming, and collaborative whiteboards (Excalidraw, tldraw, FigJam) for brainstorming and sketching.
When choosing a diagramming tool, consider who will be creating and consuming the diagrams. Developers often prefer text-based tools that version-control well. Cross-functional teams need visual editors that everyone can use. For architecture documentation, tools that support standard notations (C4, UML) are valuable.
All diagramming tools
JavaScript-based diagramming tool that renders diagrams from text definitions.
Intelligent diagramming platform for flowcharts, wireframes, and technical diagrams.
Free, open-source diagramming tool that works in the browser with no account needed.
Open-source collaborative whiteboard with a friendly interface and embeddable SDK.
Collaborative whiteboard from Figma for brainstorming, diagramming, and workshops.
Technical design tool for architecture diagrams, design docs, and cloud diagrams.
Technical diagramming tool for software architecture, system design, and engineering docs.
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Frequently asked questions
What's the best free diagramming tool?
Text-based diagrams vs visual editors — which is better?
FigJam vs Excalidraw — which whiteboard should I use?
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