draw.io
Self-HostedOpen-source diagram editor for flowcharts, UML, and technical diagrams
Overview
draw.io is a free, open-source diagram editor for creating flowcharts, UML diagrams, ER models, network maps, and more. It supports real-time collaboration, import/export in PNG, SVG, PDF, and XML formats, plus integration with cloud storage (Google Drive, Dropbox). For self-hosting, it offers a lightweight Docker image or static files deployable on any web server, with offline functionality and privacy-focused local storage options. Ideal for teams or individuals needing a cost-free, customizable tool without third-party dependencies.
Key Features
- Create diverse diagrams (flowcharts, UML, network maps)
- Real-time collaboration
- Multiple export formats (PNG, SVG, PDF)
- Self-hostable via Docker or static files
Frequently Asked Questions
? Is draw.io hard to install for self-hosting?
No—draw.io can be self-hosted easily using its official Docker image (minimal configuration needed) or static files deployed on any web server (like Nginx). No backend dependencies are required for static deployment, making it accessible for users with basic server skills.
? Is draw.io a good alternative to Lucidchart?
Yes—draw.io offers core diagramming features (flowcharts, collaboration, export options) for free, unlike Lucidchart's paid tiers. It’s ideal for users prioritizing privacy (via self-hosting) and cost savings, though it lacks some advanced team features like SSO or premium templates.
? Is draw.io completely free?
Yes—draw.io is 100% free and open-source. All features, including collaboration, self-hosting, and format support, are available without any hidden fees or subscription requirements.
Top Alternatives
Tool Info
Pros
- ⊕ Privacy-focused self-hosting options
- ⊕ No subscription fees
- ⊕ Supports offline functionality when self-hosted
Cons
- ⊖ Requires basic server knowledge for self-hosting
- ⊖ Interface lacks polish compared to premium tools like Lucidchart