Privacy

Last updated: 13 October 2026

This is my personal website, and I, James Jackaman, am responsible for the personal data it handles. You can contact me by email.

tl;dr: this site sets no cookies. I count visits with a statistics tool that I run myself, which does not store your IP address.

Visit statistics

To see which pages are read, each page sends a short message to a statistics server that I run, using the open-source software Umami. The message contains:

  • the address and title of the page you opened;
  • the address of the page that linked you here, if your browser shares it;
  • your browser’s language setting.

From the request itself, the server also works out your browser, operating system and type of device, and an approximate location (never more precise than a city) from your IP address. Your IP address is used for that lookup and to create an anonymous visitor number, which changes at least once a month. The statistics software does not store the IP address itself. I do not try to identify anyone from these records, and I do not combine them with other data.

I do this on the basis of my legitimate interest in understanding how the site is used (Article 6(1)(f) of the GDPR). These records are manually wiped from time to time.

You have the right to object to your visits being counted. To do so, contact me, and I will exclude your IP address from the statistics.

What is stored on your device

Nothing, unless you use the light/dark switch at the top of the page. Your choice is then saved in your browser so that it is remembered next time. It is not sent anywhere.

Other companies involved

Your browser contacts three companies when it loads this site. Each of them receives your IP address, as any web server does:

  • GitHub hosts the site and logs visitors’ IP addresses for security purposes (privacy statement).
  • jsDelivr, run by Volentio JSD Limited in the UK, delivers two open-source libraries that the pages load, MathJax and Mermaid (privacy policy).
  • Cloudflare carries the traffic to my statistics server (privacy policy).

GitHub and Cloudflare are US companies certified under the EU–US Data Privacy Framework.

Your rights

You can ask me what personal data I hold about you, and ask me to correct or delete it. Because the statistics contain nothing that I can link to a particular person, I will almost surely be unable to find records of your visits. You also have the right to complain to the Norwegian Data Protection Authority, Datatilsynet.

If you email me, I use your address and your message only to deal with your enquiry.