CodeSandbox

Instant cloud sandboxes for web development and code review

From $0/mo

About CodeSandbox

CodeSandbox pioneered the concept of disposable cloud sandboxes for frontend development, allowing any project to be forked and run in milliseconds. The platform supports all major JS frameworks including React, Vue, Next.js, and Svelte with pre-configured templates. Devboxes, their newer product, provide full VM-based environments for more complex backend workloads. GitHub integration allows opening any repository branch directly in CodeSandbox for PR review without local checkout. The AI assistant helps with code explanations and generation within sandboxes. Teams use it heavily for creating minimal reproductions when filing bug reports.

Key Features

Instant sandbox from template or GitHub URL

Full VS Code editor in browser

Live preview with hot reload

Shareable URLs for collaboration

GitHub PR integration for code review

Devboxes for full VM environments

AI coding assistant

NPM package support

Pros & Cons

Pros

• Fastest way to create a shareable JS reproduction — essential for OSS bug reports
• GitHub integration lets you open any branch without local setup
• Huge library of community templates covering every major framework
• Free tier is genuinely useful for most public sharing use cases

Cons

• Performance degrades with complex projects or large node_modules
• Not designed for long-running backend or DevOps workflows
• Devboxes can be slow to spin up compared to local environments
• Limited support for non-JavaScript ecosystems

Best For

Frontend developers creating bug reproductions OSS maintainers reviewing contributor PRs Teams sharing interactive code demos JavaScript educators and tutorial authors