I built a collection of 100% client-side developer tools (JSON, Base64, Crontab). No server uploads, purely secure.

As a developer, I use online formatters and encoders every single day. However, most online tool websites are bloated with ads, require logins, or—worst of all—upload our sensitive data (like database JSON configs or API keys) to their servers.

That's why I decided to build a clean, ad-free, and 100% local-run developer toolbox: 6+2 Free Online Tools.

All calculations, parsing, and formatting happen entirely in your local browser. Your data never leaves your computer, which means zero security risks.

Here are a few tools that I use most frequently:

JSON to TypeScript Interface: Generates clean TS interfaces, supports optional properties and exports.