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JSFiddle vs StackBlitz: catalog facts
JSFiddle	StackBlitz
Freemium Free with ads; a PRO subscription removes ads and adds private fiddles and collections.	Freemium Free to start in the browser, with paid plans for teams.
Web	Web
Nothing to install; runs in the browser Shareable links for snippets and demos	Runs Node.js in the browser with no local setup Environments boot in milliseconds
Ads in the editor on the free plan Private fiddles and the console require PRO	Focused on JavaScript and web projects Depends on a modern browser with WebAssembly support
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.