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draw.ioDiagram Designer
Free

Free and open source under Apache 2.0. The project states you can use it for any purpose…

 Free

Freeware with source code under the MIT licence.

Windows, macOS, Linux Windows
  • Works entirely offline with files stored locally, so nothing is uploaded
  • Large shape libraries including AWS, Azure, Cisco and Kubernetes icon sets
  • Small 2 MB installer
  • Template palettes for flowcharts and UML
  • Electron, so it is heavy for a diagram editor
  • No real-time collaboration in the desktop build
  • Windows only
  • Dated interface and simple feature set
Downloadable app Downloadable app
Open source Open source
License: Apache-2.0 License: MIT
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked October 2, 2026

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