Author: Emanuel Eichhammer
contact details

If you would like to inquire other licensing options, have found a bug, or want to leave a comment, please get in touch via the support e-mail address (PGP see page bottom) or use the contact form below.






If not noted otherwise, all non-source-code and non-software content of this website is licensed under the Creative Commons license Attribution-NonCommercial-ShareAlike 3.0 (cc by-nc-sa). For legal details, see the corresponding creative commons website. The QCustomPlot logo is excluded from this licensing and may only be used to refer to the QCustomPlot library or this website.

If not noted otherwise, all source code and software content published on this website is licensed under the GNU General Public License version 3 (GNU GPLv3) or later. It's Free Software.

Privacy Policy

The QCustomPlot website only stores and processes the personal data that is necessary for user-friendly operation, and tries to keep the amount of stored personal data to a minimum. In the following, the different categories of data, as well as the involved processing of the data is explained.

Data in logfiles

The regular logfiles created by the server contain a shortened form of your IP address (last eight bits anonymized), your browser type and version, your referring website URL and the date/time of the connection request. The logfiles are analyzed irregularly in order to learn about the visitor count of the website, and the preferred browser to optimize website appearance. A local program is used for analysis, the logfiles are not processed by a third party service, except for the default usage statistics generation by the webspace provider that hosts (Artfiles New Media GmbH).

Newsletter, contact form and forum

If you have subscribed to the newsletter, your email address is stored asymmetrically encrypted, of which the private key is not stored on the server.
If you submit a post on the forum, the according content text, your pseudonym, the current date and time, and a shortened form of your IP address (last eight bits anonymized) are stored.
If you submit a contact message through the contact form, the entered information (name, email, message) is forwarded to the support email address and thus is stored on the email server.


The website uses a PHP session cookie to keep people logged in to the forum and remember their pseudonym during a session. However, the website excluding the forum is still functional if you choose to block cookies via according settings in your browser. This session cookie isn't used by to track you across different websites or analyze your user behaviour.

Your rights regarding the stored and processed personal data

For example, you may request further details about the nature of the data storage and processing, copies of your data, amendment of your data in case it is incorrect or incomplete, as well as immediate deletion of your data, and the objection of future processing of your data. For details, please see the respective articles, e.g. 16 to 21, of the General Data Protection Regulation 2016/679.

Deletion of personal data

Your personal data will be deleted as soon as it is not needed anymore for the website's operation and, if you have subscribed to the newsletter, sending of newsletters to you. For example, upon unsubscribing from the newsletter, the according database entry containing your encrypted email address is deleted. You can unsubscribe from the newsletter either by clicking the unsubscribe-link offered at the bottom of every newsletter email, or by simply contacting us via the support email address or the contact form.

Third-Party Content

To provide an optimized and unified font appearance, the website uses web fonts provided by the service called "Google Fonts" (by Google, Inc.). It allows remotely loading font files, which means a connection to a possibly US based server of Google, Inc. (or a company working with them to provide the service) is established. For details about what parts of your personal data that gets transferred in the process (typically the IP address, browser type and version, requested font files) they store and process, please see their privacy policy at

Responsible Party / Controller

The party responsible for the website in the sense of data protection laws is the same as listed on the contact page above. If you have any questions or requests regarding your data, please do not hesitate to get in contact either via the support email address, the postal address, the contact form, or the forum.