Code Playgrounds

NameURLLanguagesTagsNotes
JavaScriptNode.jsHTMLCSSReact
GalleryRemixLive CollaborationVSCode IntegrationFormatting

JavaScriptHTMLCSS
GalleryTutorial ModeClassroomsRemixLive CollaborationRewindIntegrated ConsoleAnnotationInfinite Loop ProtectionP5.js Aware

P5.js Editor
JavaScriptHTMLCSS
RemixFormattingP5.js Aware

Repl.it
JavaScriptHTMLJavaC/C++CSSNode.js
ClassroomsTemplatesRemixIntegrated ConsoleGit IntegrationAnnotation

Also supports many other languages. Built-in database.

CodePen
JavaScriptHTMLCSS

JSFiddle
HTMLJavaScriptCSS

JS Bin
HTMLJavaScriptCSS

Older. Don't know if this is used much any more

CodeSandbox
JavaScriptHTMLCSSNode.jsReact
TemplatesGit Integration

ShaderToy
WebGL
Gallery

Code Sandbox
JavaScript

CodeChef

GitPod

PaizaCloud
Node.js

Supports Jupyter Notebook, MySQl, RoR