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Free online code playgrounds

Run code instantly in your browser. JavaScript, TypeScript, Python, C++, Go, SQL, and more. No signup, no setup, no installation.

Playcode began in 2016 as a browser coding environment. Its free code tools, the compilers, playgrounds and editors on this page, are now called Playcode Classic. Playcode today is an AI platform for building and running websites and apps. See the AI website builder

Live Coding Interview

Conduct technical interviews online. Share a link, watch the candidate code in real-time, run their code together. No screen-share, no setup.

Code playgrounds

Run any language directly in your browser. No server.

JavaScript Playground

Write, run, and share JavaScript code instantly. No signup, no setup.

JavaScript Compiler

Full IDE with cloud sync, npm packages, and live preview.

JavaScript Sandbox

Test any snippet or npm package in an isolated, in-browser space.

JavaScript REPL

Type an expression, run it, read the result in an instant console.

Code Playground

Run JavaScript, TypeScript, HTML, CSS, React, and Vue in one place.

TypeScript

React, Vue, Svelte with instant type-checking.

Python

Run any Python package. Matplotlib, Plotly, pandas — all in browser.

C++

C++20 compiler runs 100% in browser. No server required.

C

C17 compiler runs 100% in browser. No server required.

Go

Go interpreter runs 100% in browser. No server required.

SQL

Postgrespgvector

Full PostgreSQL with 18+ extensions including pgvector. Data persists locally.

Framework and project templates

Start with a working framework, stylesheet, or web app starter.

Frameworks

React Vue Angular

Styles

Web app starters

HTML / CSS / JS Progressive Web App

See all templates →

Developer tools

Free utilities for everyday developer tasks.

JSON Formatter

Format and validate JSON instantly.

JSON to TypeScript

Convert JSON to TypeScript types.

Regex Tester

Test regular expressions against sample text.

JSON Diff

Compare two JSON documents side by side.

Ready to ship something real?

Playgrounds are great for tinkering. When you want to ship a real app, site, or internal tool — describe it and let AI build it.

Try the AI app builder