CodeSandbox

CodeSandbox provides cloud development environments that let teams code, review and run projects instantly in the browser or on iOS, with AI assistance built in.

Overview

CodeSandbox evolved from the beloved online code playground into a full cloud development platform. Each project runs in a microVM-based environment that starts in seconds, supports any stack, and can be shared with a link for collaboration and review. Its AI assistant helps generate and explain code within these environments.

Teams use CodeSandbox for pull request review in running environments — reviewers open the actual running app rather than reading diffs — and for standardized dev environments that eliminate “works on my machine” problems. The unique iOS app even allows reviewing and editing code from an iPad or iPhone.

CodeSandbox’s cloud development environments boot in seconds, support any language and framework, and run in microVMs with full network and filesystem access. The review workflow stands out: reviewers open a live, running version of each pull request, comment directly in the environment and share links with teammates. Templates standardize team setups, and the platform’s AI assistant helps generate and explain code inside these environments.

Key Features

• Instant cloud dev environments with microVM performance
• Review pull requests in live, running environments
• AI code generation and explanation built in
• Real-time multiplayer editing and sharing
• Standardized templates for consistent team setups
• Unique iOS app for mobile code review

Pricing

CodeSandbox is free for personal use and open source; paid team plans add private environments, faster hardware, teams and enterprise controls.

Who Is It For

Teams that want instant, shareable dev environments and a better pull request review experience.

FAQ

Is CodeSandbox free to use?

Yes for individuals; teams subscribe for private projects and collaboration features.

Does CodeSandbox offer an API?

Yes — CodeSandbox exposes APIs and SDKs for creating and managing sandboxes programmatically.

How does CodeSandbox compare to alternatives?

Its PR review in live environments and the iOS companion give it use cases generic dev environments lack.

Can I review pull requests in CodeSandbox?

Yes — CodeSandbox opens running environments for pull requests so reviewers can interact with the actual app, not just read diffs.

How does CodeSandbox help with code review?

CodeSandbox transforms review from reading diffs to using the product. Each pull request opens as a running environment, so reviewers click through the actual changes rather than imagining them. Comments attach to the live environment, and links can be shared with non-technical stakeholders. Standardized templates keep environments consistent across the team, eliminating setup friction. For distributed teams working across time zones, the ability to review a running build asynchronously shortens feedback loops considerably.