The latest articles on Forem by Alvaro (@alguive). https://forem.com/alguive https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3838166%2Fb617af0c-2f51-4cb7-98f5-4fcd746d9556.jpeg https://forem.com/alguive en Alvaro Sun, 22 Mar 2026 09:40:29 +0000 https://forem.com/alguive/all-my-favorite-dev-tools-were-on-10-different-websites-so-i-built-one-with-everything-1k0o https://forem.com/alguive/all-my-favorite-dev-tools-were-on-10-different-websites-so-i-built-one-with-everything-1k0o <p>I've been using JSON formatters, cron schedulers, password generators and Base64 encoders since my first day as a web developer. Always jumping between tabs, always the same ugly interfaces from 2012.</p> <p>Then last year JSONFormatter.org and CodeBeautify.org made the news — years of user data exposed. Passwords, API keys, cloud credentials. Stuff developers had been pasting there assuming it was safe.</p> <p>That was enough for me.</p> <p><strong>So I built <a href="https://devessentials.dev/" rel="noopener noreferrer">devessentials.dev</a></strong> — a collection of the tools I actually use, running 100% in your browser. No backend. No server ever sees what you paste. You can verify it yourself: open<br> DevTools → Network tab, use any tool, watch zero requests go out.</p> <h2> What's in it </h2> <ul> <li>JSON Formatter, Validator &amp; Beautifier</li> <li>JWT Decoder &amp; Debugger</li> <li>Hash Generator (MD5, SHA-256, SHA-512)</li> <li>Base64 Encoder/Decoder</li> <li>UUID Generator (v1, v4, v7)</li> <li>Password Generator &amp; Strength Checker</li> <li>Cron Builder</li> <li>Diff Checker</li> <li>URL Encoder/Decoder</li> <li>JSON ↔ YAML, JSON ↔ CSV converters</li> <li>JSON Repair <em>(great for fixing broken LLM output)</em> </li> </ul> <h2> Tech </h2> <p>Built with Next.js 15, fully static. No ads, no login, no analytics on your inputs.</p> <h2> What's next </h2> <p>Adding more tools as I need them. Feedback welcome.</p> webdev javascript nextjs productivity