Hey HN! I've been building random tools whenever I needed them over the past few months, and now I have 177 of them. Started because I was tired of sketchy converter sites with 10 ads, so I just... made my own.

Some highlights for the dev crowd:

Developer tools: - UUID Generator (v1/v4/v7, bulk generation): https://calcbin.com/tools/uuid-generator - JWT Generator & Decoder: https://calcbin.com/tools/jwt-generator - JSON Formatter/Validator: https://calcbin.com/tools/json-formatter - Cron Expression Generator (with natural language): https://calcbin.com/tools/cron-expression-generator - Base64 Encoder/Decoder: https://calcbin.com/tools/base64 - Regex Tester: https://calcbin.com/tools/regex-tester - SVG Optimizer (SVGO-powered, client-side): https://calcbin.com/tools/svg-optimizer

Fun ones: - Random Name Picker (spin wheel animation): https://calcbin.com/tools/random-name-picker - QR Code Generator: https://calcbin.com/tools/qr-code-generator

Everything runs client-side (Next.js + React), no ads, no tracking, works offline. Built it for myself but figured others might find it useful.

Browse all tools: https://calcbin.com/tools

Tech: Next.js 14 App Router, TypeScript, Tailwind, Turborepo monorepo.

All open to feedback!