9 free UK-focused tools: Gas Mark, shoe size, VAT (10 countries), live currency rates (ECB), length, weight, area, volume, temperature, speed. No ads, no tracking. Most conversion sites are US-centric. UK tools are scattered everywhere — I wanted one clean site for everything a British person actually needs. 100% browser-side — nothing touches a server. No cookies without consent. No personal data ever. Built with Astro + React + Tailwind, hosted on Cloudflare Pages.