Who's behind FlyerUtility
FlyerUtility is an initiative of Thousand31 Technologies. We build focused, privacy-respecting web tools, and FlyerUtility is our take on the everyday calculator and utility site — free, fast, and without the accounts or upsells.
What FlyerUtility is
FlyerUtility is a collection of free online calculators and everyday tools — covering finance, unit conversion, image editing, PDF handling, Islamic practice and more. Every tool runs entirely in your browser using JavaScript. There's no account to create, no email to give up, and no file or number you enter is ever uploaded to a server.
Why we built it
Most "free tool" sites online bury a simple calculation behind popups, forced signups, or by silently uploading your files to process them server-side. We wanted the opposite: type a number or drop a file, get your answer instantly, and walk away without leaving a trace. That's the whole product.
How the tools work
Every calculator, converter, image tool and PDF tool on this site is powered by client-side JavaScript running in your own browser. When you resize an image, merge a PDF, or calculate a loan payment, that work happens on your device — not on our servers. We don't have a backend that stores your inputs, and we can't see what you type or upload.
How the site is funded
FlyerUtility is supported by Google AdSense advertising shown on this site. Ads help cover hosting costs and let us keep every tool free with no signup required. We don't sell user data — for the simple reason that the tools don't collect any to begin with.
Get in touch
Found a bug, have a tool you'd like to see, or just want to say hello? Visit our Contact Us page.