The short version: the tools are free, use them lawfully, and they come without warranties.
1. The tools
Zento Tools provides browser-based utilities free of charge. You may use them for personal and commercial purposes. All computation happens on your device; the site stores nothing you enter.
2. Acceptable use
Use the tools lawfully. Do not attempt to disrupt the site, misrepresent the tools' output as professional advice (financial, medical or legal), or use the contact form for spam.
3. Intellectual property
The site's design, text and code are the property of Zento Tools and its contributors, protected by applicable law. You may link to any page; you may not republish substantial portions of the site's content as your own.
4. No warranties
The tools are provided “as is”, without warranties of any kind. While care is taken to keep calculations correct, Zento Tools does not guarantee that every result suits your particular purpose — verify critical results independently.
5. Limitation of liability
To the maximum extent permitted by law, Zento Tools is not liable for any indirect or consequential loss arising from use of the site.
6. Changes
These terms may be updated; the date above shows the latest revision. Continued use constitutes acceptance.
Last updated: October 2026.