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What is StackBlitz WebContainers?

StackBlitz WebContainers provide a groundbreaking client-side runtime that runs Node.js, package managers, and full-stack frameworks directly inside the browser. They eliminate the need for remote development servers by using the user's local CPU and memory for compute, delivering unmatched performance, security, and scalability. Through the WebContainer API, developers can boot an isolated environment, mount project files, install dependencies, and execute dev scripts exactly as they would on a local machine. This capability enables highly interactive experiences like full-stack playgrounds, live documentation, onboarding workflows, educational sandboxes, and AI-native IDEs that operate entirely in-browser. WebContainers support all major frameworks, Wasm workloads, and modern browsers including Chromium, Firefox, and Safari Technology Preview. They provide native support for npm, pnpm, and yarn, enabling realistic, production-grade workflows in disposable environments. Because execution happens on-device, teams drastically reduce infrastructure costs while delivering fast, low-latency development experiences. The API is designed for reliability, making it easy to create branded, custom editors or integrate with existing apps. Leading companies and open-source maintainers rely on WebContainers for secure, interactive environments that accelerate shipping and improve developer experience. As the backbone of StackBlitz's own platform, WebContainers are continuously refined and production-proven, offering a future-ready foundation for web-based development tools.

What is Codespaces?

Unlock the full potential of Visual Studio Code, which integrates an editor, terminal, debugger, version control, settings synchronization, and a wide range of extensions. You can easily switch between working in your browser and on your desktop. Instantly generate new development environments for projects of any scale using prebuilt images, with GitHub’s remarkable 35GB development image starting in under ten seconds. You can enhance your cloud virtual machines to support up to 32 cores and 64GB of RAM, ideal for resource-intensive operations. With low-latency connections across four regions, the experience feels as if it’s running locally on your machine. Instantly preview changes in the browser with real-time reloads facilitated by websocket and HMR support, and streamline collaboration by sharing both private and public ports with your team. Every technical detail can be meticulously adjusted, bolstered by a custom dotfiles repository that allows for optimal configuration. This setup offers an ideal combination of flexibility and performance, enabling developers to concentrate entirely on their creative processes while achieving greater efficiency in their workflows.

Media

Media

Integrations Supported

Bolt.new
HTML
JSON
JavaScript
Next.js
Node.js
React
TypeScript

Integrations Supported

BLACKBOX AI
C
C++
GitHub
Google Chrome
Microsoft Edge
Mozilla Firefox
Open Interpreter
PHP
Safari
SonarQube for IDE
Visual Studio Code

API Availability

API Availability

Has API

Pricing Information

Pricing not provided
Free Version

Pricing Information

$4 per user per month
Free Version

Supported Platforms

SaaS
Chromebook

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

StackBlitz

Date Founded

2018

Company Location

United States

Company Website

webcontainers.io

Company Facts

Organization Name

GitHub

Date Founded

2008

Company Location

United States

Company Website

github.com/features/codespaces

Categories and Features

Code Editors

Not specified

IDE

Not specified

JSON Editors

Not specified

Categories and Features

Code Editors

Not specified

HTML Editors

Not specified

IDE

Not specified

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