Free online calculators and generators
ToolHub
A collection of small, fast calculators and generators that run entirely in your browser. No sign-up, no upload, nothing leaves the page.
What it does
Built around a few ideas
Instant
Static pages that load immediately and compute as you type. No spinner, no round trip.
Nothing is uploaded
Every calculation happens in your browser. Your input never reaches a server.
One page per tool
Each tool is its own page, so you can bookmark or link straight to the one you need.
Questions
Before you click through
Is ToolHub free?
Yes, and there is no account or sign-up at any point.
Does ToolHub upload what I type?
No. Every calculation runs in your browser using JavaScript — nothing you enter is sent to a server.
Does it work offline?
Once a page has loaded, the calculators on it keep working without a connection, since the computation happens locally. Loading a new page still needs one.