Hey Product Hunt! 👋 I built DevToolKit because I was tired of the same daily routine: jump to one site to format JSON, another to decode a JWT, a third to test a regex — each one with signup popups, cookie banners, and ads everywhere. So I built all 19 tools I actually use into one place. The twist: everything runs client-side in your browser. No backend, no database, no accounts. Your data literally never leaves your tab. The tools: Data: JSON Formatter & Validator, JSON Tree Viewer (collapsible tree + click to copy paths like response.data[0].email), YAML ↔ JSON, SQL Formatter Encoding: Base64 Encoder (text + drag & drop files), URL Encoder/Decoder Security: JWT Decoder, Hash Generator (SHA-1/256/384/512 via Web Crypto API), Password Generator DevOps: Cron Expression Parser (shows next 10 run times), PostgreSQL Config Generator (free PGTune alternative — enter your RAM and CPU, get optimized postgresql.conf) Generators: UUID v4, QR Code (PNG + SVG), Lorem Ipsum Reference: Regex Tester, Text Diff Checker, Timestamp Converter, Color Converter, HTTP Status Codes (37 codes with causes & fixes) Tech decisions I'm proud of: Web Crypto API for hashing and password generation — zero external crypto libraries, hardware-accelerated Each tool is a separate page with its own SEO, not a single-page app with tabs. Google indexes each tool independently Built with Next.js 14 + Tailwind CSS, deployed on Vercel What's next: Building CSV ↔ JSON Converter, chmod Calculator, and Markdown Preview based on feedback. I'd love to hear: what developer tool do you use daily that's annoying or bloated? That's probably the next one I'll build. Thanks for checking it out! 🛠

DevToolKit - Free browser-based dev tools — no signup, no tracking

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