About — Finance Tools

About Finance Tools

Finance Tools is a free, privacy-first collection of financial calculators built for a global audience. Every calculation runs entirely in your browser — no data is sent to any server.

Our Tools

Mortgage Calculator Estimate monthly payments, total interest, and the true cost of a home loan including PMI, taxes, and insurance.

Salary After Tax Calculate take-home pay after federal, state, and FICA taxes in the US, or income tax and National Insurance in the UK.

Rent vs. Buy Compare the long-term financial outcome of renting versus buying a home, factoring in appreciation, investment returns, and recurring costs.

Why We Built This

Financial decisions deserve clear, unbiased numbers. Many online calculators are cluttered with ads, collect your data, or lock basic features behind paywalls. We built a fast, clean, open alternative that anyone can use.

Technology

Built with vanilla HTML, CSS, and JavaScript. Charts are rendered with Chart.js. No frameworks, no trackers, no cookies.

Open Source

This project is open source. Contributions, bug reports, and feature requests are welcome on GitHub.