StackBlitz is an instant fullstack web IDE for the JavaScript ecosystem. It's powered by WebContainers, the first WebAssembly-based operating system which boots the Node.js environment in milliseconds, securely within your browser tab.

OverviewCopied!

Run Steel browser automation scripts with JavaScript/TypeScript directly in StackBlitz without any local setup or installation. This browser-based environment makes it perfect for quick prototyping, sharing running examples, or collaborative development.

Plus, with Bolt.new (StackBlitz's AI-powered web development agent), you can use natural language to write scripts and build full-stack applications around Steel's capabilities—all instantly in your browser.

Requirements & LimitationsCopied!

• Steel API key (any plan, get a free key here)

• Supported languages: JavaScript and TypeScript

• No account required to run code (only to save changes)

Starter TemplatesCopied!

• Steel Puppeteer Starter - Node.js template using Puppeteer

• Steel Playwright Starter - Node.js template using Playwright

Running any templateCopied!

To run any of the starter templates:

1. Click on the template link above to open it in StackBlitz

2. Set your STEEL_API_KEY in one of two ways:

   • Export it in the terminal: export STEEL_API_KEY=your_key_here

   • Create a .env file and add: STEEL_API_KEY=your_key_here

   Note: Don't have an API key? Get a free key at app.steel.dev/settings/api-keys

3. Run the command npm run in the terminal to run the script

No account is required to run or even edit the templates - you only need to sign in if you want to save your changes.

AI-Powered Development with Bolt.newCopied!

All our StackBlitz templates can be opened in Bolt.new, an AI-powered web development agent built on StackBlitz's WebContainer technology. With Bolt.new, you can:

• Use natural language prompts to modify Steel automation scripts

• Build full-stack applications around Steel's capabilities

• Get AI assistance while developing your browser automation workflows

• Deploy your projects with zero configuration

Look for the "Open in Bolt.new" button on our templates to get started with AI-assisted development.

Additional ResourcesCopied!

• StackBlitz Documentation - Learn more about StackBlitz's features

• Session API Overview - Learn about Steel’s Sessions API

• Support - Get help from the Steel team

Note: Sections marked with → indicate detailed guides available.