JSFiddle

What JSFiddle is

JSFiddle is a browser-based code hosting platform and playground for building and sharing frontend examples. It supports HTML, CSS, JavaScript, React, and Tailwind, with separate editor panels for HTML, JavaScript, and CSS alongside the rendered result. Listed starter options include Preact, TypeScript, CoffeeScript, SCSS, CSS Grid, Bootstrap, and PostCSS. You can add external libraries by searching CDNJS or entering a URL, then embed fiddles on other pages using an iframe or script. Embeds can show selected tabs and use a chosen theme and accent color. Documentation also describes loading examples from GitHub repositories and Gists, plus an API for displaying a fiddle from a POST request without saving it on JSFiddle. A beta AI code-completion feature uses Mistral Codestral and requires your own API key. The free Basic service is available, while PRO costs €8 per month and includes private fiddles and collections, custom-domain Fiddle Pages, an ad-free editor and listing pages, collections, and early feature access. A one-time €80 option provides PRO features for one year.