Pick a language and start coding
Every compiler runs instantly in your browser with AI help — no installs, no configuration.
Compile and run C online with a full GCC toolchain. Learn how computers really work — memory, pointers and fast programs — with instant output.
- Full GCC compiler
- C99 & C11 standards
- Pointer & memory help
- Instant feedback
Write and run C++ in your browser with G++ and full STL support. Master classes, templates and object-oriented programming.
- G++ with C++17
- Full STL support
- Object-oriented coding
- Templates made simple
Run Java online on the OpenJDK runtime — no JDK install. Write once, run anywhere; ideal for college, Android and exams.
- OpenJDK runtime
- OOP from day one
- Collections practice
- Clear error help
Run Python 3 online with clean, simple errors. The friendliest first language — and the language of AI and data science.
- Python 3 interpreter
- Simple, clean errors
- Great for beginners
- Used in AI & data
Run SQL queries online against practice datasets with instant results. Master the most in-demand data skill for job interviews.
- SELECT, JOIN, GROUP BY
- Subqueries & CTEs
- Practice datasets
- Instant query results
Write HTML online with a live preview that renders instantly. Structure web pages with tags, elements, forms and semantic layouts.
- Live preview
- HTML5 standards
- AI code helper
- Instant rendering
Design and preview CSS live in your browser. Style layouts with Flexbox, Grid, animations and modern colours.
- Visual live design
- Modern CSS3 rules
- Layout guides
- AI styling tips
Run JavaScript online with modern ES2023+ syntax and Node.js. Build websites, apps and servers with the world’s most used language.
- Modern ES2023+ syntax
- Async & Promises
- Browser APIs
- Works with Node.js