About Diagramium
Diagramium is a free diagram editor with 27 tools — from sequence diagrams, flowcharts and org charts to mind maps, timelines, architecture and threat models — made for developers, product managers, educators, analysts, adult learners and support teams. It runs entirely in your browser: draw by dragging, or type Alice->Bob: Hello in the sequence tool and watch the diagram appear.
For everyone. Every feature is free, with no account and no minimum age. See the Terms of Use.
Local-first by design. There are no accounts and no sign-in. Your diagrams live in your browser and in the files you choose to export; they are never uploaded.
Made by DhuRee Labs Inc., Ontario, Canada.
Privacy at a glance
This is a summary. The full Privacy Policy governs — it also covers everything stored in your browser and every service provider we use.
Who we are. Diagramium ("we"), a product of DhuRee Labs Inc., is operated from Ontario, Canada and follows the Personal Information Protection and Electronic Documents Act (PIPEDA).
Your diagrams stay on your device. They are stored in your browser and in files you export yourself, and are never uploaded to us. Clearing your browser's site data deletes them, so keep backups of important work.
Narration and recording. Presentations are read aloud by a voice that runs on your device — the app only ever picks on-device voices, and stays silent if your browser has none — and a recording is captured and saved by your own browser; we receive neither. Some browsers also offer cloud voices, which speak by sending the text to Google or Microsoft: those sit last in the voice list, labelled, and speak only if you choose one yourself.
Nothing reaches us. There are no accounts and no sign-in. The app collects nothing about you or how you use it: no usage counts, no analytics, no advertising, and it sets no cookies. Our web host sees standard technical logs (IP address, browser type), and if you email us we have your email. Accounts were retired on October 2, 2026 and the data they held was deleted.
Children. Diagramium is a general-audience service, not directed to children, with no minimum age: using it does not involve giving us personal information.
Your rights. You can ask for access, correction or deletion of your data at admin@dhureelabs.com, and complain to the Office of the Privacy Commissioner of Canada.
Terms at a glance
This is a summary. The full Terms of Use govern — they also carry the acceptable-use rules and our copyright position.
- Free, no account. Everything works without signing in. Under the age of majority, a parent or guardian must agree to the Terms for you.
- Your content is yours. You own the diagrams you create, and you may use your exports — including ones built from our templates — for any lawful purpose, personal or commercial.
- Our content is ours. The app, brand, templates, narration and artwork belong to DhuRee Labs Inc.; don't extract or redistribute them as standalone assets (see the Terms of Use, sections 7–8).
- Acceptable use. Don't use the app or our hosted services for anything unlawful, harmful or abusive, and don't present exported diagrams as endorsed by us.
- No warranty. The app is provided "as is". Browser data can be cleared at any time — keep backups (Export → Project or Text). Nothing in the terms limits consumer rights that cannot be waived under Ontario law.
- Governing law. Ontario, and the federal laws of Canada applicable there.
About the example diagrams
This is a summary. The full Content Disclaimer governs.
They are starting points, not sources of truth. Every diagram in the gallery is an illustrative example, written to be opened, edited and made your own — not a reference work, a standard, or a statement of how any named organisation or system actually works.
- Simplified on purpose. Steps are collapsed, edge cases and error paths left out, figures rounded. An omission is not evidence that something does not exist.
- Not always current. Standards are revised and laws are amended; a diagram is a snapshot of when it was written, and some are drafted with AI assistance and then edited by a person.
- Not professional advice — medical, legal, financial, engineering, security or educational. Do not implement a security control or make a clinical, legal or safety decision from a diagram alone.
- Names are used nominatively. Any organisation, product or standard named is identified, not endorsed, and remains the property of its owner.
- What you publish is yours. Verify it against your own authoritative sources, and don't present it as ours or as endorsed by anyone named in it.
Found something wrong? Tell us at admin@dhureelabs.com — we are glad to fix it.