JMMG.dev
Passion for dev
Free, open learning tools and developer utilities I build outside work. Each one is a real product: designed, built and deployed end to end.
kitforweb
Web developer tools that never see your data
Developer utilities for JSON, JWT, regex, CSS, Mermaid and more, running entirely in the browser. Paste production tokens or customer data without fear: nothing leaves your machine, and it keeps working offline.
- Next.js
- TypeScript
- Tailwind CSS
- shadcn/ui
Play RxJS
Play, run, learn RxJS
Interactive RxJS documentation with more than 150 operators explained through editable examples. Change the code, run it and watch the console react in real time, with sandboxes and real-life patterns.
- Angular
- RxJS
- TypeScript
CSS Layout Lab
Learn CSS layouts by playing with them
An interactive lab to master CSS layouts, from block and inline to flexbox, grid, container queries and anchor positioning, with live HTML and CSS editors that update the result as you type.
- Next.js
- TypeScript
- CSS Grid
- Flexbox