I got tired of online JSON formatters freezing my browser, so I built a purely client-side one 🚀

Look, we've all been there. You get a 5MB minified JSON response from a broken API. You copy it, google "Online JSON formatter", click the first link, paste it in, and... your browser tab completely locks up for 10 seconds. Worse, if that payload contains production user data or API keys, you just blindly uploaded it to some random backend server so it could run JSON.stringify(). It’s a terrible workflow, and it’s a massive privacy leak. I finally got annoyed enough to fix this for my own daily use. I spent the last couple of weeks building a secure JSON parser that runs entirely locally in the browser. No server calls, no uploads, no latency. You can try it live here (no ads, totally free): 👉 Mini-Tools.uk - Zero-Trust JSON Formatter How it works under the hood The goal was to make it handle massive payloads without nuking the browser's memory, while keeping the data strictly on the client side. Here’s the breakdown: Local Processing Only: Everything happens in your browser's RAM. You