CodeSandbox is an online code editor that accelerates web app development by allowing real-time collaboration and instant previews. It's perfect for developers, teams, and educators looking to prototype and share projects effortlessly.
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At a glance
Geared toward solos and small teams deciding fast.
Pricing: Free + Pro
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CodePen lets you create, share, and showcase front-end code snippets in real-time. It's perfect for web developers and designers looking to collaborate and get instant feedback.
Free + Pro
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<a href="https://mcsaas.app/tools/codesandbox"><img src="https://mcsaas.app/tools/codesandbox/badge" alt="CodeSandbox on MC SaaS" height="20"></a>Added on April 12, 2026