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CodePen vs Playhouse: catalog facts
CodePen	Playhouse
Freemium Free to use, with paid plans for additional features.	Free Free and open source under the GPL-3.0 licence.
Web	Linux
Live preview of HTML, CSS and JavaScript as you type Nothing to install	Local alternative to online web playgrounds Simple setup through Flathub
Needs an internet connection Suited to small demos rather than full projects	Linux only Small project with a short commit history
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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