Built to give developers superpowers
VS Code-style editor
Full IntelliSense, Vim mode, 12 languages, hidden test cases and instant verdicts — zero config. IntelliSense + Emmet Vim keybindings Instant verdicts
Instant online compiler
A blank editor, custom stdin and a secure cloud sandbox — plus a Web mode for HTML/CSS/JS, React and Next.js.
AI mentor that never spoils
Progressive hints that read your exact code and output — concept, approach, edge cases, optimization.
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Release notes
Compiler Web mode — run HTML/CSS/JS with a live preview, build React with npm packages you add on the fly, and spin up Next.js on an in-browser Node runtime with a file explorer and a terminal streaming the dev-server output. Toggle between Language and Web at the top of /compiler A completely redesigned landing page — floating glass navbar, animated aurora and particle backgrounds, animated headlines, a magic bento feature grid, stacking workflow cards, glass stat bars, marquees and magnetic buttons — in full light and dark themes, tuned for mobile Smoother onboarding — springier step transitions and staggered, animated option cards throughout the setup wizard Improved 1 Landing headings, cards and grids now align consistently across every screen size Fixed 2 Frontend challenges and the compiler Web mode could show 'Couldn't connect to server' — the sandbox runtime was blocked by our security policy and is now allowed The compiler page no longer flashes a hydration error when your saved editor settings differ from the defaults v2.2.0
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