OpenDevUtils - Privacy-First Dev Utils | Web, Desktop & Chrome Extension
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Privacy-first developer utils for JWT decoding, JSON formatting, Base64 conversion, UUID generation, timestamp conversion, text diff, cron parsing, regex testing, SQL formatting, and more. Available as a web app, desktop app, and Chrome extension. All processing happens locally — no data leaves your device.

Replies
finally a toolkit that doesn't shove my jwt tokens into some random server, the local processing is a huge plus. cron parser was the standout for me