CodeSandbox is an online integrated development environment (IDE) that enables developers to create, run, and share web applications without local setup. It provides a browser-based workspace that supports modern JavaScript frameworks such as React, Vue, and Angular, along with Node.js backends and static front-end projects.

The platform works by provisioning a virtual development environment in the cloud for each project, allowing code to be edited, executed, and previewed in real time. It supports dependency management through npm, instant hot reloading, and project templates that replicate local development workflows inside the browser.

CodeSandbox is designed to simplify collaboration and prototyping by allowing multiple users to edit projects simultaneously and share live URLs for instant access. It is widely used for rapid prototyping, debugging, sharing reproducible examples, and building full-featured web applications in a sandboxed environment.

In addition to its browser IDE, CodeSandbox also offers integrations for local development workflows and supports deployment workflows for certain project types. Its ecosystem includes tools like Sandpack, which allows embedding live coding environments into documentation and websites.

Key features include:

• Full-featured browser-based IDE for web development
• Support for modern frameworks like React, Vue, and Angular
• Real-time collaboration and shareable live previews
• Built-in npm dependency installation and project templates
• Integration tools like Sandpack for embedding code environments

Common use cases include:

• Prototyping web applications
• Sharing reproducible bug reports
• Teaching and learning web development
• Collaborative coding sessions
• Building frontend demos or documentation examples

CodeSandbox is developed by the CodeSandbox team as a cloud development platform focused on simplifying modern web application workflows.