1. Introduction
SeedUML is an independently developed project. These terms apply to both the SeedUML Playground at seeduml.dev and the SeedUML for Jira plugin (an Atlassian Forge app).
By using SeedUML, you agree to these terms. If you don't agree, please don't use the service.
2. Service Description
Playground — A free, browser-based diagram editor at seeduml.dev/playground.html. No account is required. You write PlantUML or Mermaid code, and diagrams are rendered entirely in your browser. Nothing is sent to any server unless you explicitly choose server-side rendering.
Jira Plugin — An Atlassian Forge app that renders PlantUML and Mermaid diagrams inline in Jira issue descriptions. It uses the same client-side rendering engine as the Playground. The plugin runs within the Atlassian Forge sandbox.
Both products use a zero-trust architecture: all rendering happens client-side by default. No diagram data leaves your browser unless you opt in to server-side rendering.
3. Acceptable Use
You agree not to:
- Use automated tools to scrape, crawl, or overload the service
- Attempt to reverse-engineer, decompile, or extract the source code of the rendering engine
- Launch denial-of-service attacks or otherwise interfere with the service's availability
- Submit malicious content (scripts, exploits, harmful payloads) through the Report Issue form or any other input
- Use the Report Issue feature for anything other than genuine rendering issues
4. Intellectual Property
Your diagrams are yours. SeedUML does not claim any ownership or rights over the diagrams you create. Your diagram source code is never stored on our servers (it stays in your browser).
Issue reports. When you submit a rendering issue through the Report Issue form, the anonymized diagram code and SVG you include may be used by SeedUML to reproduce bugs and improve the rendering engine. You review the submitted data before sending it.
SeedUML property. The SeedUML software, brand, logo, website content, and documentation are the property of SeedUML. You may not use the SeedUML name or branding to imply endorsement or affiliation.
5. Third-Party Services
SeedUML integrates with or relies on several third-party services:
- plantuml.com and mermaid.ink — Used only when you explicitly choose "Server" rendering mode. Your diagram code is sent to these services for rendering. They are not controlled by SeedUML and have their own terms and privacy policies.
- Atlassian Forge — The Jira plugin runs within Atlassian's Forge platform and is subject to Atlassian's Cloud Terms of Service.
- Cloudflare — Provides hosting (Cloudflare Pages), DNS, and anti-bot protection (Turnstile) for the Playground. Subject to Cloudflare's terms.
6. Disclaimers
SeedUML is provided "as is" without warranty of any kind, express or implied. This includes, but is not limited to, warranties of merchantability, fitness for a particular purpose, and non-infringement.
There is no guarantee of uptime or continuous availability. The service may be interrupted for maintenance, updates, or unforeseen circumstances.
SeedUML is not liable for any data loss. Your diagrams exist in your browser — make sure to export and back up anything important. The Jira plugin stores data in Atlassian's Forge Storage, which is managed by Atlassian.
7. Changes to These Terms
These terms may be updated from time to time. Changes will be posted on this page with a new effective date. We recommend checking this page periodically. Continued use of SeedUML after changes constitutes acceptance of the updated terms.
8. Contact
If you have questions about these terms, reach out at [email protected].