I built 59 free browser-based dev tools in vanilla JS — here's what I learned

The creator of Antigravity Tools has released 59 free, browser-based developer utilities built entirely with vanilla JS. To ensure maximum privacy and security, the project follows strict constraints: zero dependencies, zero servers, and zero telemetry. Unlike other tools that log data, every operation runs locally using native APIs such as Web Crypto API, Canvas API, Web Audio API, and IndexedDB. The suite avoids Node.js, npm packages, Google Analytics, and cookies, eliminating the need for any build step.