Steel Browser
VerifiedOpen-source browser API that powers web interactions for AI agents and automation apps.
What is Steel Browser?
Steel is an open-source browser API that lets AI agents and applications control real Chrome instances through standard automation libraries. It abstracts away the work of launching browsers, preserving state across requests, and managing resources so teams can focus on agent logic instead of infrastructure.
The system runs as a server that exposes endpoints for creating sessions, executing browser commands, and retrieving outputs such as screenshots or page content in readable formats. Built-in support for proxies, extensions, and stealth techniques helps agents operate reliably on live websites.
It targets AI engineers and developers who need dependable browser automation for agent workflows, data collection, or interactive web tasks without building custom browser clusters from scratch.
Capabilities
What you can build with Steel Browser
Live web agents
Create agents that browse sites, fill forms, and extract information while maintaining session state across multiple steps.
Automated data collection
Convert web pages to markdown or structured data, capture screenshots, and generate PDFs through simple API calls.
Browser tool integration
Connect existing automation scripts using Puppeteer or Playwright to a managed environment with proxy and debugging support.
Install Steel Browser
docker run -p 3000:3000 -p 9223:9223 ghcr.io/steel-dev/steel-browser# Pull and run the Docker image
docker run -p 3000:3000 -p 9223:9223 ghcr.io/steel-dev/steel-browser- 1Pull the pre-built Docker image from GitHub Container Registry.
- 2Run the container while mapping ports 3000 and 9223 to localhost.
- 3Open the local UI at http://localhost:3000/ui to inspect active sessions.
- 4Create a new browser session via the API and connect your automation client.
- 5Execute commands such as navigation or content extraction and review results.
Steel Browser: pros & cons
Pros
- +Provides complete browser control through familiar libraries like Puppeteer and Playwright.
- +Includes session persistence, proxy rotation, and stealth features out of the box.
- +Offers built-in tools for converting pages to markdown, screenshots, and PDFs.
- +Supports local Docker deployment as well as one-click cloud options.
Cons
- –Still in public beta so stability and feature completeness may vary.
- –Requires Docker or cloud deployment rather than a simple library install.
- –Advanced customization may need direct interaction with the underlying CDP.
Frequently asked questions
You can connect using Puppeteer, Playwright, or Selenium through the Chrome DevTools Protocol.
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