Are my diagrams uploaded to a server?

No. They are drawn, rendered and stored in your browser, and nothing about them is transmitted — including when you export or share.

Can I use this for confidential architecture?

The diagram itself never leaves your machine, which is the property most review processes care about. Check with whoever owns your policy, and note that a share link contains the diagram, so it should be handled like the file.

Reference

Privacy and your data

Diagrams are drawn and stored in your browser and are never uploaded. What third-party cookies exist, what they are for, and how to turn them off.

Your diagrams

Diagrams are created, rendered, exported and stored entirely in your browser. No diagram is ever uploaded, because there is no diagram storage on the other end to upload it to. That covers everything you draw, every export you make, and every file you open from disk.

Share links keep that property — the diagram rides in the part of the URL after the #, which browsers never send to a server.

Analytics and ads

Separately from anything above, the site uses Google Analytics to count visits, and Google AdSense to show the ads that pay for hosting. Both can set cookies, and both are asked about on your first visit.

Until you agree, both run with every consent signal denied: they serve non-personalised output and write no cookies. Neither can see your diagrams — they are not sent anywhere for either one to read. You can change your mind any time from Cookie settings in the Help dialog.

Why there are ads

The tool is free, has no account system and no paid tier, so ads cover what it costs to host. They are kept out of the way of the work: the rail beside the canvas can be collapsed, and it is not shown at all on a phone, where the drawing surface needs the room more than the page needs the impression.

Frequently asked

Are my diagrams uploaded to a server?: No. They are drawn, rendered and stored in your browser, and nothing about them is transmitted — including when you export or share.
Can I use this for confidential architecture?: The diagram itself never leaves your machine, which is the property most review processes care about. Check with whoever owns your policy, and note that a share link contains the diagram, so it should be handled like the file.

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