TimestampLab - Free developer toolkit for timestamps, cron, JWT & more

Hey Product Hunt! 👋 I'm the solo developer behind TimestampLab. I built this because I was tired of juggling 10 different bookmarks every time I needed to debug a log file, convert a timestamp, or generate a cron expression. The goal was simple: build a toolkit that's fast, private, and actually pleasant to use. 🔒 **Privacy-first**: Everything runs in your browser. No data is ever uploaded — you can even disconnect your internet after loading the page and everything still works. 🎨 **Terminal-inspired design**: Because developers spend half their lives in terminals anyway. Dark mode by default, monospace fonts, green-on-black vibes. 🌏 **Bilingual**: Full English and Chinese support. I wanted to make sure non-English-speaking devs have access to quality tools too. 💰 **100% free, no ads**: This is a passion project. I might add a "Buy me a coffee" button someday, but the tools will always be free. 🛠️ **Tech stack**: React + Vite + Tailwind CSS, deployed on Cloudflare Pages. The entire site is ~200KB gzipped. I'd love to hear: - Which tool do you find most useful? - What other time-related dev tools should I add next? - Any bugs or UI papercuts? Thanks for checking it out! ⏱️