About ToolKitHub

ToolKitHub is a free collection of small, focused online tools — things like counting words, formatting JSON, generating passwords, converting images, and doing quick calculations. Every tool is built to do one job well, load fast, and get out of your way.

Why most tools run in your browser

Wherever possible, a tool processes your input entirely on your own device using JavaScript built into your browser — nothing is uploaded to a server. That means your text, passwords, and images stay private by default, and the tool works even without a fast connection. Each tool page states plainly whether it's fully client-side.

Why it's free

These tools solve problems we've needed solved ourselves — there's no account tier, no usage limit, and no paywall. The site may show advertising or affiliate links in the future to cover hosting costs; see our Privacy Policy for how that would work.

Accuracy and limitations

Tools like the BMI or percentage calculator use standard, publicly documented formulas, and we test each tool before publishing it. That said, for anything health-related, financial, or otherwise consequential, treat the result as a quick estimate and verify anything important with a qualified professional or official source.

Questions or feedback?

Found a bug, or want a tool that isn't here yet? Visit our Contact page — we read every message.