QuickTools - Convert, calculate, generate; all in your browser

Hey Product Hunt 👋 I built QuickTools after getting frustrated with online converters that took 8 seconds to load just to convert 10 cm to inches and then asked me to sign up. So I built my own: 18 free tools across 4 categories. 📏 Converters: length, weight, temperature, speed, area 🧮 Calculators: percentage, BMI, loan, age, tip 🧰 Generators: password, QR code, random number, UUID ✍️ Text tools: word counter, case converter, Lorem Ipsum, dedupe Everything runs client-side. No backend, no database, no API calls. When you convert, generate, or calculate, the math happens in your browser. Your data never leaves your device. Design choices I made: • No sign-up, no email, no cookies from my side • Live conversion: no "Convert" button, results update as you type • Copy button everywhere: because the #1 thing people do is paste the result somewhere else • Mobile-first: every tool works perfectly on a phone The hardest part wasn't the math. It was making 18 different tools feel like one product. I ended up building a small CSS design system that every tool inherits. I'd love your feedback on: 1. Which tool feels most useful to you? 2. What tool would you actually use daily that I haven't built? Not trying to make money off this, just wanted tools that don't suck. Happy to answer any build questions 🙏