Excalidraw is an open-source virtual whiteboard for sketching diagrams and collaborating in real time.
- Free and full: infinite canvas, unlimited collaborators, PNG/SVG/file export, and Notion and Obsidian integrations — right in the browser, no account.
- Excalidraw+: unlimited cloud scenes and folders, access management, share rights, read-only embeds, voice hangouts, presentations with PDF/PPTX export, extended AI, and team management.
14-day free trial; built for fast visual thinking.