Built a free browser-only dev tools site, no server side slowness, no signup

We all know that moment when you just want to format a JSON response from an API, and somehow you end up with 4 tabs open — one for JSON formatter, one for base64 decoder, one for regex tester, and one you don't even remember opening? Or when you paste your data into some "free online tool" and it spins for 3 seconds doing a SHA-256 hash... on a server... somewhere... for a string you typed. A string. That your own laptop could hash in microseconds or less. I got fed up and built devmesh.me The