[ PRIVACY ]
Your diagrams stay yours.
ZenUML renders sequence diagrams in your browser. The library itself does not phone home, track you, or transmit your diagram source.
The sequence-diagram library
The open-source @zenuml/core library runs entirely client-side. When you render a sequence diagram, your text is parsed and drawn locally in the browser or host application. The library does not send your diagram source, inputs, or personal data to any ZenUML server. There is no telemetry, no usage beacon, and no update check built into the package — what you install from npm is all that runs.
Hosted surfaces
Products that embed ZenUML — the Live Editor at app.zenuml.com, the Confluence app, IDE plugins — each have their own privacy terms set by their host platform. Those surfaces may offer accounts, document storage, or product analytics that this library does not. Review the relevant provider's policy for details about accounts, storage, and analytics on those surfaces; this page covers only the library and this website.
This website
This site serves static pages from a content delivery network. It sets no cookies, runs no analytics, serves no ads, and contains no sign-up forms, comment boxes, or other inputs that could collect personal information. If we add analytics later, we will update this page first.
What we do not collect
We do not collect names, email addresses, account credentials, payment details, or behavioural profiles through this site. We do not fingerprint your browser, and we do not read or store the diagrams you create with the library — they never reach us. Our hosting provider may keep standard, short-lived server logs (IP address, user agent, requested URL) for security and capacity purposes, as virtually all web hosts do; we do not enrich or cross-reference those logs.
Third-party requests
Some page resources are fetched from third-party CDNs, and — like any web request — those fetches disclose your IP address and user agent to the operator. Specifically: every page loads the JetBrains Mono webfont from Google Fonts (fonts.googleapis.com and fonts.gstatic.com), and the home page additionally loads the @zenuml/core bundle from the jsDelivr CDN (cdn.jsdelivr.net) to render its live demo in your browser. Each operator handles those requests under its own privacy policy. No other third-party resources are loaded.
If you email hello@zenuml.com, we will see your address and the content of your message. We use that information only to reply to you; we do not add you to mailing lists or share your address with anyone else.
Changes to this policy
We will post any changes to this page and adjust the site footer if the scope of data handling ever changes. This plain-language policy will be replaced with a full legal document before public launch. Questions about privacy? Email hello@zenuml.com.