I built a unit converter with zero dependencies (no ads, no frameworks)

I've been annoyed by unit conversion sites for years. They're slow, covered in ads, and half of them require JavaScript frameworks just to multiply a number by 2.54. So I built a dead-simple unit converter — no ads, no tracking, no frameworks. Just a single HTML file that does the math instantly. What it converts Length: mm, cm, m, km, in, ft, yd, mi Weight: mg, g, kg, t (metric tons), oz, lb Temperature: Celsius, Fahrenheit, Kelvin Volume: mL, L, tsp, tbsp, fl oz, cup, pt, qt, gal Area: cm², m², km², in², ft², ac, mi² Speed: m/s, km/h, mph, knots Data: bits, bytes, KB, MB, GB, TB It also includes a data size converter, which I couldn't find anywhere as a standalone tool without it being buried 3 clicks deep. Why no framework? The whole thing is ~400 lines of vanilla HTML/CSS/JS. Loads in under 100ms even on a slow connection. No npm, no build step, no dependencies. Just open it and it works — including offline once cached. I'm old enough to remember when the web was like this everywhe