Excalidraw
Virtual whiteboard for sketching hand-drawn-style diagrams.
FreeWireframing
Wireframing
Low-fidelity structure and flows.
Low-fidelity structure and flows.
Virtual whiteboard for sketching hand-drawn-style diagrams.
Flowcharts, wireframes, mind maps and docs in one fast workspace.
Wireframes, mockups and diagrams in one app.
AI site builder for sitemaps and wireframes, exported to Figma or Webflow.
Minimal wireframing in the browser.
A very good free whiteboard — and an SDK for building canvas apps.
Wireframes, sitemaps and UI docs.
Diagramming and visual collaboration.
Free diagramming for flowcharts and architecture.
Figma's online whiteboard for teams.
Quick, low-fidelity wireframes that keep focus on structure.
Visual sitemap builder.
Sitemaps, user flows and personas.
Docs and diagrams for engineering teams.
Diagrams from text.