Built 40+ free client-side tools to protect dev privacy. What should I add next?

Hey Product Hunt community! 👋

As developers, we constantly use web utilities like JSON formatters, UUID generators, or Cron builders. However, many popular tools online are heavily bloated with ads and process your sensitive payloads on their servers.

To solve this, I built PakDigitalz (https://pakdigitalz.com). It’s a suite of 40+ free calculators and utilities that run 100% locally in your browser sandbox using JavaScript and Web Crypto APIs. Zero bytes ever leave your device.

Key highlights:

🔒 100% private & client-side (Zero database logging)

🛠️ Developer workbench (JSON validation, v4/v7 UUIDs, Cron previewer)

📈 Localized finance tools (PTA mobile duty check, FBR income tax slabs)

📚 Students tools (CGPA target predictor)

I would love to get your feedback on the user experience and would appreciate knowing: Which developer or productivity tools do you use daily that you'd like to see running client-side?

Looking forward to your thoughts! 🚀