changedetection.io

## About The best and simplest self-hosted free open source website change detection monitoring and notification service. An alternative to Visualping, Watchtower etc. Designed for simplicity - the main goal is to simply monitor which websites had a text change for free. ## Features * Lots of trigger filters, such as "Trigger on text", "Remove text by selector", "Ignore text", "Extract text", also using regular-expressions! * Target elements with xPath 1 and xPath 2, CSS Selectors, Easily monitor complex JSON with JSONPath or jq * Switch between fast non-JS and Chrome JS based "fetchers" * Track changes in PDF files (Monitor text changed in the PDF, Also monitor PDF filesize and checksums) * Easily specify how often a site should be checked * Execute JS before extracting text (Good for logging in, see examples in the UI!) * Override Request Headers, Specify POST or GET and other methods * Use the "Visual Selector" to help target specific elements * Configurable proxy per watch * Send a screenshot with the notification when a change is detected in the web page ## Example use cases - Products and services have a change in pricing - Governmental department updates (changes are often only on their websites) - New software releases, security advisories when you're not on their mailing list. - Festivals with changes - Realestate listing changes - Know when your favourite whiskey is on sale, or other special deals are announced before anyone else - COVID related news from government websites - University/organisation news from their website - Detect and monitor changes in JSON API responses - JSON API monitoring and alerting - Changes in legal and other documents - Trigger API calls via notifications when text appears on a website - Glue together APIs using the JSON filter and JSON notifications - Create RSS feeds based on changes in web content - Monitor HTML source code for unexpected changes, strengthen your PCI compliance - You have a very sensitive list of URLs to watch and you do _not_ want to use the paid alternatives. (Remember, _you_ are the product)