Puppeteer is an open-source JavaScript library for browser automation developed by the Chrome team at Google. It provides a high-level API for controlling Chrome and Firefox programmatically using the Chrome DevTools Protocol (CDP) and WebDriver BiDi. Puppeteer is commonly used for browser automation, testing, scraping, performance analysis, and rendering workflows.

The library runs browsers in headless mode by default, allowing automated tasks to execute without a visible UI, though it also supports full “headful” interactive browser sessions. Developers can automate nearly any browser interaction including navigation, clicks, form submission, keyboard input, authentication flows, screenshots, and PDF generation.

Puppeteer is distributed as two packages: puppeteer and puppeteer-core. The main puppeteer package automatically downloads a compatible Chrome browser during installation, while puppeteer-core provides only the automation library for users managing browsers separately.

A major use case for Puppeteer is automated testing and rendering. Developers use it for end-to-end testing, regression testing, UI automation, server-side rendering, SEO pre-rendering, and generating screenshots or PDFs of webpages. Because it controls a real browser engine, it can accurately execute JavaScript-heavy applications and modern frontend frameworks.

Puppeteer also supports advanced browser tooling and debugging workflows. The ecosystem includes @puppeteer/browsers, a browser management toolkit for installing and launching different browser builds programmatically or via CLI. The project additionally supports MCP integrations and experimental WebMCP APIs for AI-assisted browser automation.

The library has become one of the most widely used browser automation tools in the Node.js ecosystem and serves as foundational infrastructure for testing frameworks, scraping systems, developer tools, and AI browser agents.

Key features include:

• High-level browser automation API for Chrome and Firefox
• Headless and headful browser execution modes
• Support for Chrome DevTools Protocol and WebDriver BiDi
• Automated screenshots and PDF generation
• UI testing and form automation capabilities
• Browser performance tracing and debugging tools
• Support for browser extensions and SPA rendering
• Browser installation and management tooling (@puppeteer/browsers)
• JavaScript and TypeScript support
• Open-source Apache 2.0 license

Common use cases include:

• End-to-end testing and browser automation
• Web scraping and data extraction
• Screenshot and PDF generation
• Server-side rendering and SEO pre-rendering
• Automated form submission and workflows
• Browser-based AI agent systems
• Performance diagnostics and tracing

Puppeteer is maintained by the Chrome DevTools team and is positioned as a foundational browser automation framework for developers building testing systems, automation tools, and AI-driven browser workflows.