Flatris
Modern, fast, collaborative diagramming tool. Flowcharts, UML, ERD, and network diagrams in browser.
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Use it free
Open the official tool or demo — no account needed.
Self-host it
Run the open-source version on your own infrastructure.
What is Flatris?
Flatris is an open-source vector diagramming application licensed under Apache-2.0 that translates user input into scalable Vector Graphics (SVG) and Extensible Markup Language (XML) diagrams. It solves the issue of visual clutter and vendor format lock-in by maintaining an open document standard while offering automated visual alignment tools. Software engineers, database administrators, and network architects rely on it to generate precise visual documentation. The software takes canvas drag events, text inputs, and structural shape definitions as inputs. It then renders vector paths, routing lines, and text labels across a grid-backed canvas, producing output files in drawio, XML, SVG, or PNG formats containing embedded diagram metadata. First, it provides orthogonal connector auto-routing, which calculates optimal visual paths around intermediate shapes using Manhattan routing algorithms. Second, it includes automatic layout engines that reorganize hierarchical trees or organic network nodes in milliseconds based on configurable force-directed models. Third, it features custom shape library importing via XML or SVG stencils, allowing enterprise design teams to enforce visual standards across thousands of architectural diagrams. When compared to enterprise alternatives like Microsoft Visio or Lucidchart, Flatris offers full source code access under the Apache-2.0 license. This transparency enables organizations to host isolated instances on private networks, inspect security controls, and eliminate recurring per-user licensing costs.
How it works
Flatris is an open-source vector diagramming application licensed under Apache-2.0 that translates user input into scalable Vector Graphics (SVG) and Extensible Markup Language (XML) diagrams. It solves the issue of visual clutter and vendor format lock-in by maintaining an open document standard wh
How to use it
- 1Use the Flatris tool.
- 2Use the Flatris tool.
- 3Use the Flatris tool.
- 4Use the Flatris tool.
What it can do
- Utility
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/jgraph/drawio-desktop
- license: Apache-2.0 — free to use
- privacy: Opens an external demo
Limitations
- External demo — opens a third-party website that you do not control.
- Relies on an external source (github.com); availability depends on that service.
- Focused on the diagram tools category: Modern, fast, collaborative diagramming tool. Flowcharts, UML, ERD, and network diagrams in browser..
Understanding the result
Modern, fast, collaborative diagramming tool. Flowcharts, UML, ERD, and network diagrams in browser.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by drawio-desktop (Apache-2.0).
- Built with
- drawio-desktop (jgraph/drawio-desktop)
- License
- Apache-2.0
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Text
- Output
- Output
Built with jgraph/drawio-desktop. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- drawio-desktop
- License
- Apache-2.0
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- jgraph/drawio-desktop — GitHub Repository
Upstream project · GitHub
- Apache-2.0 License
Upstream project
Frequently asked
What is Flatris?
Modern, fast, collaborative diagramming tool. Flowcharts, UML, ERD, and network diagrams in browser.
Where can I find the source code?
The source is available at https://github.com/jgraph/drawio-desktop
What license is it?
Apache-2.0.
Is it free to use?
Yes, it is open-source and free to use.