网页相似度判断：根据网页结构判断页面相似性 ，可用于相似度计算、越权检测等(Determine page similarity based on HTML page structure)

A library for comparing two HTML files/snippets and highlighting the differences using simple HTML. Includes support for comparing complex lists and tables

Calculate the differences between two XML/HTML documents.

Compare HTML contents

CompareXML is a fast, lightweight and feature-rich tool that will solve your XML/HTML comparison or diffing needs. its purpose is to compare two instances of Nokogiri::XML::Node or Nokogiri::XML::NodeSet for equality or equivalency.

MIGRATED TO CODEBERG -- A HTML diff generator with display HTML output.

exact diffs of rich text

Symfony Bundle for caxy/php-htmldiff library (https://github.com/caxy/php-htmldiff)

This tool compares old and new versions of html and generates color-coded html in a diff format.

Monitors DOM structure changes on target websites to protect web scraping pipelines from breaking silently. Using no AI, no ML, no black boxes. Pure algorithmic approach.

Reusable HTML diff visualizer for browser apps with isolated styles and Vite builds.

Intelligent web page comparison tool with Wayback Machine support and visual regression testing

A TypeScript library for rendered HTML visual diff with side-by-side DOM comparison, npm package output, and browser SDK support.

Diff and markup HTML with <ins> and <del> tags.