PageDiff is a free Chrome extension designed to monitor changes on web pages, providing a daily snapshot of any specified URL. It allows users to easily compare different versions of a page to see what has been altered, whether it be text changes, price adjustments, or updates to terms of service. With its user-friendly interface, users can select any two snapshots to visualize changes with additions highlighted in green and deletions in red, similar to a git diff experience.

What sets PageDiff apart is its ability to work with private pages and authenticated content, as it captures snapshots directly from the user's browser session. Users can choose from three diffing methods: text, HTML, or a specific CSS selector, enabling targeted monitoring of particular elements. Designed for developers, legal teams, and researchers, PageDiff operates locally without requiring an account or cloud storage, ensuring privacy and simplicity.