< playground />

Code. Run. Learn.

Pick a language and start coding in your browser — no setup required.

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Languages

50+

Starter templates

Browser

No install for Phase 1

/// featured templates

Pandas DataFrame

SQL JOIN query

Fetch API call

CSS Flexbox layout

Array methods

Matplotlib chart

/// languages

Choose your playground

HTML / CSS / JS

Live preview with HTML, styles, and vanilla JavaScript.

Runs in browser

Open playground

Python

NumPy, Pandas, Matplotlib & scikit-learn via Pyodide.

Runs in browser

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SQL

SQLite in the browser with sample HR & product data.

Runs in browser

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JavaScript

Sandboxed ES modules with console and import maps.

Runs in browser

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TypeScript

Strict TypeScript transpiled and run in your browser.

Runs in browser

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React JSX

Babel + React 18 preview with Tailwind in the iframe.

Runs in browser

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PHP

PHP 8.3 in your browser via WebAssembly — no server round-trip.

Runs in browser

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Node.js

QuickJS in your browser — Node-style built-ins, sandboxed (no npm, no network).

Runs in browser

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Next.js

Educational snippets — Server Components, routes, actions, and more.

Server sandbox

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Java

Java on onlinecompiler.io — auto-wrap for bare main code.

Server sandbox

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C

C (GCC) on onlinecompiler.io — classic systems programming.

Server sandbox

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C++

C++ (GCC) on onlinecompiler.io — STL and modern C++.

Server sandbox

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Go

Go on onlinecompiler.io — fast compile and run.

Server sandbox

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