What is webcontainer-core?

stackblitz/webcontainer-core — explained in plain English

Analysis updated 2026-06-26

★ 4,599Audience · developerComplexity · 1/5Setup · easy

Mindmap

mindmap
  root((WebContainers))
    What It Does
      Run dev environments in browser
      No local install needed
      In-browser Node.js
    Products
      StackBlitz editor
      Codeflow
      Web Publisher
    Resources
      Bug tracker repo
      webcontainers.io docs
      Discord community
    Audience
      Web developers
      Teams using StackBlitz

mindmap root((WebContainers)) What It Does Run dev environments in browser No local install needed In-browser Node.js Products StackBlitz editor Codeflow Web Publisher Resources Bug tracker repo webcontainers.io docs Discord community Audience Web developers Teams using StackBlitz

Click or tap to explore — scroll the page freely

What do people build with it?

USE CASE 1

Report a bug you found while using StackBlitz Codeflow or the WebContainers API in one central place.

USE CASE 2

Search existing issues to see if a problem in your browser-based dev environment has already been reported and tracked.

USE CASE 3

Track the status of known WebContainers limitations before building a project that depends on the API.

How does it compare?

	stackblitz/webcontainer-core	jendrikseipp/vulture	kaitai-io/kaitai_struct
Stars	4,599	4,599	4,599
Language	—	Python	Shell
Setup difficulty	easy	easy	moderate
Complexity	1/5	2/5	3/5
Audience	developer	developer	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min

No license information was provided, check the repository directly.

So what is it?

This repository is a central hub for bug reports and GitHub issues related to WebContainers, a technology made by StackBlitz. It does not contain the source code itself, instead, it exists as a place for users and developers to track problems and communicate about them in one location. WebContainers is described as a way to run development environments inside a web browser. The project is associated with a handful of StackBlitz products: Codeflow, the classic StackBlitz editor, and Web Publisher, each of which appears to be a different way to work with code or content in the browser. The README is minimal and points to external documentation at webcontainers.io for fuller details about the WebContainer API and how to configure it. An enterprise option and a Discord community are also mentioned. If you are looking for deeper technical information about how WebContainers works, the documentation site rather than this repository is the right starting point.

Copy-paste prompts

Prompt 1

I'm building an app using the WebContainers API and seeing an error. Help me write a clear, reproducible bug report with all the details needed to post on the webcontainer-core issue tracker.

Prompt 2

Show me how to configure a WebContainers environment to run a Node.js Express server inside a browser tab.

Prompt 3

I want to use StackBlitz Codeflow for my team's code reviews. What WebContainers limitations should I be aware of based on open issues?

Frequently asked questions