Unknown author · Developer Tools
5 items
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.
Sep 2, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.