About us

Free UK Tools & Calculators is a free collection of online calculators and utilities built for people in the United Kingdom. Whether you are estimating a mortgage payment, checking stamp duty, or formatting JSON, we want the experience to be fast, clear and private.

Every interactive tool on this site runs entirely in your browser. We do not require accounts, and we do not store the numbers or text you enter in a database. That means you can use sensitive figures with more confidence, and pages load without waiting on heavy backend APIs.

Our finance tools are designed around UK conventions — pounds sterling, devolved property taxes, and familiar tax concepts. Developer tools use standard browser APIs so they work offline once the page has loaded.

Results are always estimates for guidance only. They are not financial, legal, tax or medical advice. For decisions that matter, please consult a qualified professional or the relevant official body (HMRC, lenders, your GP, and so on).

Want a new tool? Get in touch. We prioritise useful, well-explained utilities that stay free and easy to use.