Sketch hand-drawn diagrams on a collaborative whiteboard.
Free alternative to Miro · Lucidchart

Screenshot from the project’s own README · tap to enlarge
Excalidraw is an infinite virtual whiteboard that makes your diagrams look like hand sketches. It works right in your web browser with end-to-end encrypted collaboration. You can draw shapes, add text, and export your work as images.
Not sure how to install, or if it’s safe? Read the beginner guide
Yes, Excalidraw is completely free and open-source under the MIT license, with no API key required to draw.
It is open source (MIT license) with 135,644 GitHub stars, last updated 2026-11-13. Download only from the official link on this page, and scan the file before installing: see the safety checklist in our beginner guide.
It serves as a lightweight, hand-drawn alternative to collaborative whiteboards like Miro and diagramming tools like Lucidchart.
Compiled from the project README. 135,644 GitHub stars (2026-11-13) · License MIT · Last update 2026-11-13