Every time I needed to quickly decode a JWT, format some JSON, or generate a UUID, I ended up on some tool site that either wanted me to sign up, buried the actual tool under three ad units, or — worse — silently sent whatever I pasted in to a server I had no reason to trust. For a lot of these tasks (hashing a password, decoding a token, checking a cert), that's not just annoying, it's a real thing to think twice about.
So I built Encoder.guru — a suite of developer tools that runs entirely client-side. No backend, no accounts, nothing you type or upload ever leaves your device. You can open dev tools and watch the Network tab to verify that yourself.
What's in it
84 tools across 11 categories at this point: JSON & text, encoding, hashing & security, image, PDF, CSS generators, code tools, text tools, color tools, and web/SEO utilities. A few I'm most happy with:
JWT Builder & Verifier — builds, signs, and verifies JSON Web Tokens with HMAC, entirely in-browser via the Web Crypto API.
