Coding playgrounds

A collection of online, coding environments for creating and sharing source code snippets. Tool support ranges from single-file programs to full-sized, progressive web apps with CDN dependencies and real-time, multi-user collabarative work environments. Most are free for basic usage, though many require accounts and paid subscription to activate advanced functionality.

This list is maintained only as a hobby, and may not always be up-to-date.

HTML + CSS + JavaScript + Typescript

• Babel REPL (source code)
• CodePen
• CodeSandbox
• JS Bin
• JSFiddle
• Liveweave
• Plunker
• RunKit
• Snack (source code)
• StackBlitz
• Typescript Playground
• UNPKG Javascript Playgrounds (source code)

Multi-language

• repl.it (source code)
• Wandbox (source code)
• Cloud9 (source code)

CSS

• CSSDeck

Dart

• DartPad (source code)

Databases

• LiveSQL

Elm

• Try Elm (source code)

Go

• The Go Playground (source code)

Groovy

• Groovy web console (source code)

Haskell

• Try Haskell (source code)

Kotlin

• Try Kotlin (source code)

Lua

• Lua: demo

PureScript

• Try PureScript! (source code)

Python

• Python.org Shell

Rust

• Rust Playground (source code)

Scala

• Scastie (source code)

Swift

• SwiftPlayground.run (source code)