Puppeteer Visual Regression Tester

Automates visual regression testing using Puppeteer page.screenshot() with pixelmatch diffing. Captures full-page screenshots at multiple viewport sizes and generates HTML diff reports with highlighted change regions.

Installation

Use the upstream install or setup path that matches your environment:

• npm i puppeteer # Downloads compatible Chrome during installation.
• npm i puppeteer-core # Alternatively, install as a library, without downloading Chrome.

Basic usage or getting-started notes:

• bash npm2yarn

• MCP

• a Puppeteer-based MCP server for browser automation and debugging.

• Source: https://github.com/puppeteer/puppeteer

• Extracted from upstream docs: https://raw.githubusercontent.com/puppeteer/puppeteer/HEAD/README.md

Documentation