Privacy Policy

Last Updated: 2023-11-11

The short version: collects no personal information besides the IP address your web browser is visiting from. Non-personal information about your visit is collected (such as your web browser version, the time of your visit, and the URL which referred you to the site). uses no cookies for its own functionality and does not read the data you use to construct diagrams. does serve ads from a third party (Google), and that service does use cookies if you allow it to. Their policies are here:

The long version:

Information does not collect

No User Personal Information is collected on besides the Internet Protocol (IP) address your device is visiting from. We do not collect: email addresses, names, phone numbers, precise locations, etc.

We do not read or store information that is entered in the SankeyMATIC diagram building inputs. Your input data belongs to you.

When you export your diagram as an image or save your work as a text file, those tasks are performed entirely within your web browser; your diagram’s data is NOT sent to our server.

What information SankeyMATIC collects and why

Information from website browsers

When you load a page on this website, we collect the same basic information that most websites collect. The information we collect about all visitors to our website includes: the visitor's browser type, language preference, referring site, and the date and time of each request. We also collect each Internet Protocol (IP) address from which a web request is made.

Why do we collect this?

We collect this information to better understand how website visitors use, and to monitor and protect the security of the website. We may use aggregated, non-personally identifying information to operate, improve, and optimize our website and service.

How we share the information we collect

We do not share, sell, rent, or trade the information we collect with third parties for their commercial purposes.

We do display advertising on from third party ad networks, which may use cookies according to their own policies (see links below).

Our use of cookies and tracking


A cookie is a small text file that a web server stores on your computer or mobile device, which your browser sends to a website when you return to it.

Third-party ad networks may use cookies, if you consent to their use. See these policy pages from Google describing their use of cookies and other tracking technologies: itself currently uses no cookies for any part of its own functionality, including the pages with diagram-building-tools.

Certain pages on the site may set other third party cookies. For example, if we embed content (such as videos) from another site, that site may set cookies.

Tracking Tools

We currently do not use third party traffic analysis services to collect information about how the website performs and how people in general navigate through and use SankeyMATIC. If we begin using such tools, this privacy policy will be updated.

SankeyMATIC's global privacy practices

The limited information that collects is stored and processed in the United States in accordance with this Privacy Policy.

As we do not collect names, email addresses, or other sensitive User Personal Information, we believe our practices to be compatible with the privacy requirements of other countries and regions as well.

Changes to this Privacy Policy

We may update the Privacy Policy from time to time.

The history of any changes will be listed (and/or linked to) at the bottom of this page.

Contacting SankeyMATIC

Questions regarding this Privacy Policy or's information practices should be directed to

History of changes

  • 2023-11-11: Initial posting