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MDN Web Docs

The honest reference for HTML, CSS, and JS

4.8
Free
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Free

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W3Schools

Try-it tutorials for HTML, CSS, JavaScript, and more

4.6
Free tier
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Free

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CodePen

Front-end pens you can fork in a tab

4.7
Free tier
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Free

SpecMDN Web DocsW3SchoolsCodePen
CategoryEducation & LearningEducation & LearningEducation & Learning
PricingFreeFree + PlusFree + Pro
Rating4.8 (21,000)4.6 (890,000)4.7 (42,000)
Community96/10090/10091/100
Tierfeaturedfeaturedfeatured
Best fordocs, javascript, css, htmltutorials, html, css, javascriptfrontend, html, css, javascript
Top features
  • ·HTML, CSS, JS reference
  • ·Browser compatibility
  • ·Guides and examples
  • ·HTML, CSS, JS, SQL, and Python lessons
  • ·In-browser try-it editor
  • ·References and quizzes
  • ·Live HTML, CSS, and JS editor
  • ·Public pens and collections
  • ·Embeds for blogs and docs