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