About Convertly — Simple, Private Everyday Tools by Firirigs

Why Convertly exists

Convertly started with a small, familiar frustration: constantly searching for the same everyday conversions and calculations. What's 180 cm in feet? How much is 0.05 BTC worth right now? What's 15% of a bill? Each answer usually meant opening a different website — often a slow one, wrapped in pop-ups and cookie banners, that wanted an account or buried the actual tool beneath a wall of ads.

So I built the place I wanted to use instead: one tidy home for the conversions and quick calculations I kept reaching for, with the tool first and everything else out of the way. That's still the whole idea. Convertly is a growing collection of small, focused tools — currency, crypto, units, sizes, data, percentages, BMI, word counting, and a handful of everyday utilities — each designed to give you a clear answer the moment you type, with no sign-up and no clutter.

Who's behind it

Convertly is built and maintained by Firirigs, an independent maker of simple web tools. It isn't a big company or a venture-backed startup — it's a personal project run by one person who cares about the small details, from the exactness of a conversion factor to the way a page feels on a phone. If something looks wrong, there's a real person on the other end who genuinely wants to know and will fix it.

Built to be private and accurate

Two things matter most to me on this site: protecting your privacy, and getting the numbers right.

Private by default Almost every tool here runs entirely in your browser. The height and weight you type into the BMI calculator, the text you paste into the word counter, the passwords you generate — none of it is sent to or stored on a server, because it never needs to leave your device. There's no account to create, and nothing tracked about what you convert.

Accurate on purpose Conversions use the exact, internationally defined factors — a pound is 0.45359237 kg, not a rounded guess. Currency and crypto tools pull live market rates when you're online and clearly label the result as an estimate when they fall back to a stored snapshot. And where a tool touches something sensitive — like BMI percentiles for children and teens — it's built on real published reference data (the same CDC growth-chart data and method behind CDC's own calculator), not an approximation.

How Convertly stays free

Convertly is free to use and supported by advertising. That's the entire business model — there's no premium tier, no paywall, and no selling of personal data. Ads are simply how a small independent site like this covers its running costs and keeps every tool free for everyone. I try hard to keep them unobtrusive and well out of the way of the tool you actually came to use. You can read exactly what is and isn't collected in the privacy policy.

What you'll find here

The toolbox currently spans four areas — money and crypto, measurement and data, everyday calculators, and text and utility tools — with more added over time. You can browse the full list on the homepage. If there's a converter or calculator you wish existed here, I'd genuinely like to hear about it.

Get in touch

Questions, corrections, feature ideas, or just want to say hello? Email me and it'll reach the person who actually runs the site.

info@firirigs.com

Spotted a number that looks off? Please tell me — accuracy reports are always welcome, and always acted on.