Review: What kind of tool is changedetection.io, a self-hostable monitoring tool that automatically checks website changes for free and notifies you?

changedetection.io was introduced as a self-hostable tool for monitoring webpage diffs on a schedule and sending conditional alerts.

The review highlighted notifications via Apprise, including Discord, Slack, LINE, and other channels.

It can narrow monitoring with CSS selectors or regular expressions, and also supports JavaScript-rendered pages through Playwright.

The article also covered login-page monitoring and Docker-based self-hosted operation.

It is useful for tracking changes on pages without RSS, such as price or stock updates, without relying on external services.