Dev Toolkit

Developer toolkit for JSON, Base64, JWT, and URL encoding/decoding

Dev Toolkit - JSON, Base64, JWT & URL Tools Description: A powerful developer toolkit with 9 essential tools - all in one place, all offline, all free. Key Features: - JSON Formatter & Validator Format and validate JSON with configurable indentation (2/4/tab). Minify support included. - Base64 Encoder/Decoder Convert text to Base64 and back. Format validation included. - JWT Token Tools Decode JWT tokens to view header, payload, and signature. Encode with HMAC-SHA256 real signing. - URL Encoder/Decoder Handle special characters in URLs. Encode/decode query parameters. - Timestamp Converter Convert Unix timestamps (seconds/milliseconds) to dates and back. UTC and local time display. Supports "now" keyword. - Hash Generator Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes instantly using Web Crypto API. - UUID Generator Generate UUID v4 identifiers. Batch generation up to 100 at once. - Color Converter Convert between HEX, RGB, and HSL formats. Auto-detects input format. - Diff Viewer Compare two texts line by line. Shows added, removed, and unchanged lines with summary. Additional Features: - Dark Mode Support - Keyboard Shortcuts (Ctrl+Enter to convert, Alt+1-9 for tabs) - Input History (last 5 per tab, auto-restored) - Copy to Clipboard with Toast Notification - Simple and Clean Interface - Instant Results - No External API Calls - Works 100% Offline Perfect for: - Web Developers - API Testers - Security Engineers - DevOps Teams - Anyone working with encoding, formatting, or data conversion Privacy & Security: - Zero permissions required - No data collection - All processing happens locally in your browser - No external server communication - Open source: https://github.com/somaz94/dev-toolkit-google-extension