I assume that <http://www.json-diff.com/> is hosted on GitHub Pages? Starting from May 1<sup>st</sup>, [custom domain also works with HTTPS](https://blog.github.com/2018-05-01-github-pages-custom-domains-https/).
I assume that http://www.json-diff.com/ is hosted on GitHub Pages? Starting from May 1st, custom domain also works with HTTPS.