DevToys Web Pro is a free, privacy-first developer utility suite that runs entirely in your browser. It packs 65+ tools for everyday engineering work: format and minify JSON and XML, encode and decode Base64 and URLs, generate and validate UUIDs, hash strings, decode JWT payloads, test regular expressions with live matches, compare text diffs side by side, convert and resize images, validate cron expressions, and more. Nothing is sent to a server for processing—your data stays on your device. The same toolkit is available in 57 languages and as a browser extension for quick access from any tab. It is built for developers who want a single place for small tasks without installing desktop apps or signing up for yet another service.