Online JS Compiler

Online JS Compiler is a powerful yet simple browser-based JavaScript playground designed for developers, students, and educators. 🎯 WHY WE BUILT THIS Most online code editors are either: • Too heavy and slow to load • Require login and track your data • Show annoying ads • Have limited features on free plans We wanted to create something different: a fast, privacy-focused, and completely free JavaScript playground that just works. ✨ KEY FEATURES 🚀 Real-time Execution • Instant code execution using Web Workers • Safe sandboxed environment • Infinite loop protection 💻 Beautiful Code Editor • Powered by CodeMirror • Syntax highlighting • Auto-closing brackets • Line numbers • Multiple themes 🎨 Customization • Dark mode (Dracula theme) • Light mode (Eclipse theme) • One-click theme toggle • Responsive design 🔗 Code Sharing • Share code via URL • Base64 encoded (no server storage) • Perfect for collaboration • Great for teaching 💾 File Management • Download code as .js file • Upload existing .js files • Auto-save to LocalStorage • Never lose your work 📱 Works Everywhere • Desktop, tablet, mobile • No installation required • Works offline (after first load) • Progressive Web App ready 🛡️ Privacy First • No user tracking • No analytics • No ads • No login required • Your code stays in your browser ⚡ Performance • Hosted on Vercel Edge Network • < 1s load time • 95+ Lighthouse score • Optimized for speed 🎓 PERFECT FOR • Students learning JavaScript • Developers testing quick snippets • Teachers demonstrating code • Technical interviews • Code sharing in discussions • Quick prototyping • Debugging small issues 🔧 TECH STACK • Vanilla JavaScript (ES6+) • CodeMirror for editing • Web Workers for execution • LocalStorage for persistence • Vercel for hosting • 100% client-side (no backend!) 🌟 WHAT MAKES US DIFFERENT Unlike other playgrounds: ✅ Completely free forever ✅ No ads or tracking ✅ No login required ✅ Open source ✅ Lightning fast ✅ Privacy-focused ✅ Mobile-friendly