A few weeks ago, a junior developer on my team pasted a massive JSON payload containing production customer data into a random "Free JSON Formatter" they found on Google.
When I checked the network tab of that tool, the payload was being POSTed directly to their backend server before being returned formatted.
As developers, we handle sensitive data constantly—JWT tokens, database dumps, proprietary SQL queries. We cannot afford to leak this data to third-party servers just because we need to format a string.
This incident sent me down a rabbit hole to find a suite of developer utilities that process data strictly on the client side. That’s when I found FreeClientToolbox.
The 100% Client-Side Architecture
