If a tool did not work, or you need something that is not here yet, write in. Every message is read by a person.
wahegurutskh@gmail.com
This is a one-person site run alongside a full-time job, so a reply usually takes a few days. Every message does get read.
A tool that fails for you often works for everyone else, so the details matter more than you would think:
Please do not attach the file itself. It is almost never needed, and your documents are your business.
Tell us the problem rather than the tool. “A form keeps rejecting my scan” is more useful than “add a PDF compressor”, because the real fix is often something different from what you expected.
Address and legal details are on the Impressum page, as required in Germany.