You’re probably leaking sensitive data every time you use online dev tools

Most developers don’t think twice before pasting data into online tools. JSON formatters, JWT decoders, base64 converters, regex testers… You just open a site, paste your data, get the result, and move on. But here’s the problem: You’re often sending that data to someone else’s server. The hidden risk That “quick utility” you’re using? It might: log your data store it temporarily or even keep it longer than you expect And most of the time, you have no idea. No clear guarantees. No visibility. No control. “It’s just a formatter” — is it? Even simple tools usually work like this: You paste your data It gets sent to a backend The server processes it You get a response That means your data leaves your machine. Sometimes it’s harmless. Sometimes it’s not. Where this becomes a real problem Think about what developers actually paste into these tools: API keys tokens internal JSON payloads logs with user data config files Stuff that was never meant to leave your environment. I caught myself do