RetroBox – 50+ In-Browser Dev & Design Tools

Fast, 100% private developer & designer tools right in your browser. JSON Formatter, JWT, Eyedropper, Crypto, and 50+ utilities.

RetroBox is a privacy-first browser extension designed for web developers, designers, and software engineers. It provides quick access to client-side utilities directly within your browser popup and Chrome side panel. All processing runs 100% locally on your device using browser APIs, with zero data transmitted to remote servers. Key Features: - Format, validate, and minify JSON data with custom indentation. - Decode JWT tokens and inspect headers, payload claims, and expiration dates. - Test regular expressions live with instant match highlighting. - Generate secure cryptographic passwords and UUID v4 identifiers. - Encode and decode text to Base64 or URL formats. - Convert Unix epoch timestamps to readable date formats. - Convert cURL requests to JavaScript fetch code. - Quick text case conversion for common programming conventions. - Calculate SHA-256 and SHA-512 cryptographic hashes. - Includes a persistent local scratchpad for quick notes and code snippets.