Sankey Open Studio Open the app

Privacy Policy & Terms of Use

Effective July 31, 2026

      The short version: your diagrams and everything in them stay on your computer. Nothing you type, paste, or draw is ever sent to a server. The only thing this site tracks is anonymous usage statistics through Google Analytics, like how many people visited and how many diagrams were created.
    

Your data stays local

Sankey Open Studio has no server, no database, and no accounts. Every diagram you create, including all names, amounts, colors, and settings, is stored only in your own browser's local storage on your own device. We cannot see your diagrams, and neither can anyone else. When you download an image or a JSON backup, the file is created on your computer by your browser.

Because storage is local, clearing your browser's site data will delete your saved diagrams. Use the JSON backup feature to keep copies you control.

What is tracked

This site uses Google Analytics to understand overall usage so the tool can be improved. That is the only tracking on the site. It records:

Standard page view information, such as pages visited, approximate region, browser type, and device type
Anonymous feature events: a diagram was created or duplicated, data was pasted (a row count only), a diagram was exported (and in which format), a backup was restored, and a built-in color preset was applied (the preset's name only)

What is never sent: the content of your diagrams. No node names, no labels, no amounts, no titles, no colors, and no file contents ever leave your browser as part of analytics or anything else.

Google Analytics sets cookies to distinguish visitors. You can block these with a browser content blocker or by disabling cookies, and the app will keep working normally. Google's own handling of analytics data is described in the Google Privacy Policy. If you download this open source app and run it on your own computer or server, you can delete the analytics snippet entirely and nothing is tracked at all.

Terms of use

Sankey Open Studio is free software released under the MIT License. You are welcome to use it for anything, personal or commercial, and to copy, modify, and share it.

The software is provided as is, without warranty of any kind. While it is built and tested with care, you use it at your own risk, and the author is not liable for lost data or for decisions made based on diagrams you create. Verify important numbers against your source data. You are responsible for the content of the diagrams you make and share.

Changes and contact

If this policy changes, the update will be posted on this page with a new effective date. Questions and concerns are welcome on GitHub issues or via LinkedIn.

Sankey Open Studio · free & open source · made by Olin Lagon