About ToolFactory

ToolFactory is a small, independent collection of free online utilities — currently 175 of them, growing every week. The idea is simple: the tool you need should load instantly, work on a phone, and never ask you to sign up or hand over an email address.

How the tools are built

Every calculator is built around a published formula, and each page is checked against worked examples before it ships — the same numbers you see in the "worked example" section on every tool. The tools are plain HTML with no frameworks, so they load fast and work offline once loaded.

Privacy in one line

All calculations happen inside your browser. We do not receive the numbers you type.

Who runs this

ToolFactory is run by an independent developer. There is no company behind it, no analytics profile of you, and no data to sell. If you spot a wrong result, please report it — accuracy matters more than the number of tools.