I got tired of pasting JSON into sketchy websites, so here's one that doesn't log anything — toolbox4devs.com

Every dev has that moment where you paste something sensitive into an online formatter and immediately think "wait, does that server just... keep that?"
I built toolbox4devs.com to solve exactly that. It's a set of everyday dev utilities that run 100% in your browser — nothing is sent to any server, ever.
What's there right now:
🔧 JSON Formatter — validate, format, minify. Syntax errors highlighted instantly.
🔄 JSON → Model — paste JSON, get C# classes or TypeScript interfaces out. Huge time saver.
🔐 Base64 Encode/Decode — boring, essential, now private.
🔗 URL Encoder/Decoder — query string wrangling without the guesswork.
📋 Text Diff — compare two blocks line by line.
🆔 UUID Generator — v4 UUIDs, single or bulk up to 100.
...and a few more. No login, no sign-up, no ads, no paywall. Just open it and use it.
I'm adding tools regularly based on what devs actually reach for — would love feedback on what's missing.
👉 toolbox4devs.com