[enygmata]

If you want to get money from donations you need publicity because most people who visit your website will never donate. If you are someone who releases/has lots tools I would recommend setting up a single domain with dedicated pages for each tool (e.g. tool.domain.com or domain.com/tool) and setting up a Patreon in addition to the donation button.

Honestly I would put ads on the extractemailaddress.com website and work on improving it's position on the search results. In addition to that localization to one or two other languages would probably be nice to boost the views. That "make a small donation" button really put me off.