CodePen: Online Code Editor and Front End Web Developer Community

Sitelet https://web.archive.org/web/20211025154734/https://codepen.io/

We're all for progressive enhancement, but CodePen is a bit unique in that it's all about writing and showing front end code, including JavaScript. It's required to use most of the features of CodePen.

Need to know how to enable it? Go here.

Close this, use anyway.

{"__browser":{"device":"unknown_device","mobile":false,"name":"unknown browser","platform":"unknown_platform","version":"0"},"__constants":{"gridIframeSandboxAttributes":"allow-forms allow-modals allow-pointer-lock allow-presentation allow-same-origin allow-scripts"},"__CPDATA":{"domain_iframe":"https://cdpn.io","environment":"production","host":"codepen.io","iframe_allow":"accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; microphone; midi; payment; vr","iframe_sandbox":"allow-downloads allow-forms allow-modals allow-pointer-lock allow-popups allow-presentation allow-same-origin allow-scripts allow-top-navigation-by-user-activation"},"__user":{"anon":true,"base_url":"/anon/","current_team_id":0,"current_team_hashid":null,"hashid":"VoDkNZ","id":1,"itemType":"user","name":"Captain Anonymous","paid":false,"tier":0,"username":"anon","created_at":null,"email_verified":null,"collections_count":0,"collections_private_count":0,"followers_count":0,"followings_count":0,"pens_count":0,"pens_private_count":0,"projects_count":0,"projects_private_count":0},"__firebase":{"config":{"apiKey":"AIzaSyBgLAe7N_MdFpuVofMkcQLGwwhUu5tuxls","authDomain":"codepen-store-production.firebaseapp.com","databaseURL":"https://codepen-store-production.firebaseio.com","disabled":false,"projectId":"codepen-store-production"},"token":"eyJhbGciOiJSUzI1NiJ9.eyJhdWQiOiJodHRwczovL2lkZW50aXR5dG9vbGtpdC5nb29nbGVhcGlzLmNvbS9nb29nbGUuaWRlbnRpdHkuaWRlbnRpdHl0b29sa2l0LnYxLklkZW50aXR5VG9vbGtpdCIsImNsYWltcyI6eyJvd25lcklkIjoiVm9Ea05aIiwiYWRtaW4iOmZhbHNlfSwiZXhwIjoxNjM1MTgwNDU0LCJpYXQiOjE2MzUxNzY4NTQsImlzcyI6ImZpcmViYXNlLWFkbWluc2RrLThva3lsQGNvZGVwZW4tc3RvcmUtcHJvZHVjdGlvbi5pYW0uZ3NlcnZpY2VhY2NvdW50LmNvbSIsInN1YiI6ImZpcmViYXNlLWFkbWluc2RrLThva3lsQGNvZGVwZW4tc3RvcmUtcHJvZHVjdGlvbi5pYW0uZ3NlcnZpY2VhY2NvdW50LmNvbSIsInVpZCI6IlZvRGtOWiJ9.Zt3-BeUG0TMTDzZHXtUGVoDKQ_JS_at9MW5_5TF2fFuIJMO2_cVPNSvjzltER7AcwhZEP7SU9zamdoqTWVKYSP7eMMCyRGVkqmHoYQWwp0lUw6o5gSbHZSPDvFnDu3BCeMrMRH3UXaMHsEaOj3O2FTD7gdIs_XGQNwMY8gYVGYOsVzu7B-un6LFuLn1vQfmcBSgD0C8m5Dgb8BuwcqpJ9uV6GTynyRJYYYR-3yZxRe2iHl-sPL3FHQYqwvcT94oWMcGDElaD-rzIAG63aPQEcahKSzFYwjAQP_QiN6bm8QsCAkWTnYNLQrCR6J4kqCW3WD-HTNvlmQjm-PIQnxXVkA"},"__graphql":{"data":{"sessionUser":{"id":"VoDkNZ","name":"Captain Anonymous","title":"Captain Anonymous","avatar80":"https://gravatar.com/avatar/b15e0cf27861794b6faa31065e8f9950?d=https%3A%2F%2Fassets.codepen.io%2Finternal%2Favatars%2Fusers%2Fdefault.png&fit=crop&format=auto&height=80&version=0&width=80","avatar512":"https://gravatar.com/avatar/b15e0cf27861794b6faa31065e8f9950?d=https%3A%2F%2Fassets.codepen.io%2Finternal%2Favatars%2Fusers%2Fdefault.png&fit=crop&format=auto&height=512&version=0&width=512","currentContext":{"id":"VoDkNZ","baseUrl":"/anon","title":"Captain Anonymous","name":"Captain Anonymous","avatar80":"https://gravatar.com/avatar/b15e0cf27861794b6faa31065e8f9950?d=https%3A%2F%2Fassets.codepen.io%2Finternal%2Favatars%2Fusers%2Fdefault.png&fit=crop&format=auto&height=80&version=0&width=80","avatar512":"https://gravatar.com/avatar/b15e0cf27861794b6faa31065e8f9950?d=https%3A%2F%2Fassets.codepen.io%2Finternal%2Favatars%2Fusers%2Fdefault.png&fit=crop&format=auto&height=512&version=0&width=512","username":"anon","contextType":"USER","__typename":"User"},"currentTeamId":null,"baseUrl":"/anon","username":"anon","admin":false,"anon":true,"pro":false,"verified":null,"teams":[],"__typename":"User"}}},"__pay_stripe_public":"pk_NgCjQmQs7wXOFmfNC0LKMgEkmlThn","__pay_braintree_env":"production"}