CodePen

Vercel

vercel.com

Deploy frontends and Next.js apps with previews on every push.

Cloudflare

cloudflare.com

CDN, DNS, Workers and R2 with an unusually generous free tier.

MDN Web Docs

developer.mozilla.org

The most reliable reference for HTML, CSS and JavaScript.

Supabase

supabase.com

Open-source Postgres backend with auth, storage and realtime.

Cursor

cursor.com

AI-first code editor built on VS Code.

regex101

regex101.com

Build, test and explain regular expressions with live highlighting.