Contact
One person builds and runs this site, and reads every message.
Write to
hello@docsfixer.com
What is useful to say
If a tool behaved oddly, the browser you used, how many pages the document had and roughly how large the file was is usually enough to find the cause.
Please do not attach the document itself. The site never receives your files and it is better that it stays that way. If a particular file will not open, saying what made it - a phone scanner, a bank, a government form - is more useful than the file.
Ideas
If a tool you need is missing, say which one and what it has to produce. The next tools are chosen from what people actually ask for, and some of the obvious ones are missing on purpose.