Developer Tools2026
DevPlayground
DevPlayground is a free browser-based HTML, CSS and JavaScript IDE powered by the Monaco (VS Code) editor — real-time preview, built-in console, Prettier formatting, 30+ starter templates and instant URL sharing.
DevPlayground brings a VS Code-grade editing experience straight to the browser. Built on the Monaco editor, it gives frontend developers three synced panes for HTML, CSS and JavaScript with a real-time live preview, an integrated console debugger, one-click Prettier formatting, and 30+ starter templates for rapid prototyping. Every playground can be shared instantly via URL — no setup, no account. It's a fast, focused alternative to CodePen and JSFiddle designed for teaching, interviews, experiments and quick UI ideas.
Links
Tech Stack
Next.jsReactMonaco Editor (VS Code engine)sandboxed iframe previewPrettierTailwind CSSURL state sharingVercel