Tools that solve real problems without wasting your time
NTN Tools began as a side project to streamline repetitive calculations for coworkers. It has since grown into a catalog of specialist utilities used by designers, educators, healthcare practitioners, and personal finance enthusiasts in more than 40 countries.
Our mission
Build reliable, privacy-conscious web tools that anyone can use for free. We focus on everyday tasks where accuracy matters, from balancing a household budget to preparing content for assistive technologies.
We invest in documentation so our decisions are transparent. Calculations link to source material, and every release includes a changelog. When we make a mistake, we publish an incident report that explains the cause and the fix.
How we work
- Discovery: We start with interviews and support tickets to understand the exact workflow we are improving.
- Design: Wireframes and prototypes are tested with real users before development begins.
- Validation: QA scripts cover edge cases, and we cross-check the results against trusted references.
- Iteration: Feedback goes into a shared roadmap. Minor enhancements roll out weekly; larger features get scheduled releases.
What we stand for
Accuracy first
Formulas are reviewed by subject-matter experts and validated with unit tests and manual QA scenarios before release.
Explain the why
Every tool includes context: data sources, example walkthroughs, and when to speak with a professional.
Respect for privacy
We process data in the browser whenever possible and clearly state when external APIs are involved.
Support with empathy
User questions are answered by the product team that owns the tool so fixes and updates happen quickly.
Milestones
Calculator launched
Released the first version of our web calculator with keyboard shortcuts and live expression previews.
First health tool
Introduced the fertility days calculator in partnership with licensed clinicians who reviewed the copy and logic.
Accessibility focus
Built the AI alt text generator and published our accessibility checklist after observing repeated content gaps.
Expanding the library
We now maintain six actively updated tools and a shared support desk covering documentation, feedback, and training.
Meet the team
NTN Tools is a distributed team of engineers, designers, and technical writers. Our core contributors share a background in developer tooling, healthcare software, and financial services. We work asynchronously, but every tool has a clearly documented owner so accountability stays high.
Interested in collaborating or contributing? Send us a note at contact@ntntools.store. We are always looking for domain experts to review new calculators and ensure our guidance stays trustworthy.
Where to next
- Expand the measurement and conversion library to cover engineering and culinary use cases.
- Publish video walkthroughs for popular workflows, starting with mortgage pre-approval planning.
- Release an API for teams that want to integrate our validated calculations into their own applications.
Follow our progress through the public roadmap on the support page.