A few months ago, I was debugging a production API issue. I copied a JWT from our logs, pasted it into an "online decoder," and immediately felt sick.
I had just sent a live production token to a stranger's server.
That moment led to ToolsMania — a suite of developer and finance tools that run entirely in your browser. No server. No database. No data retention.
The Problem with "Free" Online Tools
Most online utilities are free because you are the product. Your inputs are logged, analyzed, and sometimes leaked. For developers handling:
