About GoToolHub

GoToolHub is a small, independent collection of browser-based tools — calculators, word tools, and generators — built to answer one specific question quickly, without an account, a paywall, or a cluttered page standing in the way.

The site is built and maintained by previselab, an independent developer. Each tool is tested by hand against known reference calculations (for example, the BMI calculator is checked against standard CDC formula outputs) before it's published.

Most tools run entirely in your browser — your input for something like the Word Counter or Password Generator is never sent to a server. Where accuracy matters, like the BMI and Percentage calculators, the underlying formulas are documented in the companion guide for that tool.

GoToolHub is supported by display advertising, which keeps every tool free to use. If you spot an error in a calculation or have a tool you'd like to see built, the contact page goes straight to us.