15 Free Browser-Based Developer Tools You Can Use Right Now

Every developer needs quick tools that just work — no install, no signup. I've been building a collection of 100% client-side developer utilities that run entirely in your browser. Zero data sent to servers. Here are my favorites: Text & Data Tools 1. JSON Formatter & Validator Paste messy JSON, get it beautifully formatted with syntax highlighting. Validates on the fly. Try it → 2. Base64 Encoder/Decoder Encode text to Base64 or decode Base64 back. Handles UTF-8 properly. Try it → 3. JSON ↔ CSV Converter Convert JSON arrays to CSV and back. Great for quick data transformations. Try it → 4. Markdown Table Generator Visual table builder that outputs clean Markdown. Drag to resize columns. Try it → 5. Word Counter & Text Analyzer Real-time character, word, sentence counts plus reading time and word frequency. Try it → Security & Encoding 6. Password Generator Cryptographically secure passwords using Web Crypto API. Configurable length and character sets. Try it → 7. Hash Generator (MD5,