Write to hello@utiltools.net. One person reads it, so plain email works better than a form.
Reporting a wrong result
This is the message we most want to receive. A calculator that quietly returns the wrong number is worse than no calculator at all, so these get fixed first.
Please include three things: the address of the tool, the exact input you entered, and the answer you expected. With those we can reproduce the problem in a minute; without them it usually takes several rounds of questions.
Suggesting a tool
Tell us what you were trying to do and what you ended up using instead. The task is more useful to us than the tool name — it often turns out an existing tool is close but missing one option.
Privacy, advertising and affiliate links
Questions about what the site stores, about ad personalisation, or about a data request are answered in the Privacy Policy; affiliate arrangements are set out in the Disclosure. If either page does not cover your question, email the address above and say which page you read.
What we cannot help with
We cannot recover text you typed into a tool. Everything runs in your browser and nothing is sent to us, so once a tab is closed the data is gone from our side as well — there is no copy to retrieve.
We also cannot give legal, tax, medical or financial advice about a number one of the tools produced. The tools do arithmetic; deciding what the result means for your situation needs someone qualified in that field. See the Terms of Use.