I built a collection of developer tools that run entirely in the browser. No accounts, no server-side processing, no tracking. Includes: JSON formatter/validator, CSV to JSON/SQL converter, Regex tester, Base64 encoder, Hash generator, UUID generator, JWT decoder, Cron parser, Timestamp converter, Diff checker, and more. Tech: Plain HTML/CSS/JS. Intentionally kept it simple for fast loading and easy maintenance. Open source: https://github.com/GhDj/dev-tools Looking for feedback on what tools would be most useful to add next.