Contact

Email us directly at contact@mastertool.dev.

Write to us to report a wrong result or an outdated fee or reference table, request a new tool, make a privacy or data request, send a copyright notice, or for advertising and business enquiries. Replies are sent to the email address you provide.

Tool inputs are never sent to MasterTool. If you're reporting an error, please include the tool name and the exact values you entered so we can reproduce it.