## Web Site Change Detection, Monitoring and Notification. Live your data-life pro-actively, track website content changes and receive notifications via Discord, Email, Slack, Telegram and 70+ more [Self-hosted web page change monitoring, list of websites with changes](https://changedetection.io) [**Don't have time? Let us host it for you! try our extremely affordable subscription use our proxies and support!**](https://changedetection.io) ### Target specific parts of the webpage using the Visual Selector tool. Available when connected to a playwright content fetcher (included as part of our subscription service) [Select parts and elements of a web page to monitor for changes](https://changedetection.io?src=pip) ### Easily see what changed, examine by word, line, or individual character. [Self-hosted web page change monitoring context difference ](https://changedetection.io?src=pip) ### Perform interactive browser steps Fill in text boxes, click buttons and more, setup your changedetection scenario. Using the **Browser Steps** configuration, add basic steps before performing change detection, such as logging into websites, adding a product to a cart, accept cookie logins, entering dates and refining searches. [Website change detection with interactive browser steps, detect changes behind login and password, search queries and more](https://changedetection.io?src=pip) After **Browser Steps** have been run, then visit the **Visual Selector** tab to refine the content you're interested in. Requires Playwright to be enabled. ### Example use cases - Products and services have a change in pricing - _Out of stock notification_ and _Back In stock notification_ - Monitor and track PDF file changes, know when a PDF file has text changes. - 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 - Discogs restock alerts and monitoring - 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) - Get notified when certain keywords appear in Twitter search results - Proactively search for jobs, get notified when companies update their careers page, search job portals for keywords. - Get alerts when new job positions are open on Bamboo HR and other job platforms - Website defacement monitoring - Pokémon Card Restock Tracker / Pokémon TCG Tracker - RegTech - stay ahead of regulatory changes, regulatory compliance _Need an actual Chrome runner with Javascript support? We support fetching via WebDriver and Playwright!_ #### Key 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(1.0) and 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](https://github.com/dgtlmoon/changedetection.io/wiki/Proxy-configuration) - Send a screenshot with the notification when a change is detected in the web page We [recommend and use Bright Data](https://brightdata.grsm.io/n0r16zf7eivq) global proxy services, Bright Data will match any first deposit up to $100 using our signup link. [Oxylabs](https://oxylabs.go2cloud.org/SH2d) is also an excellent proxy provider and well worth using, they offer Residental, ISP, Rotating and many other proxy types to suit your project. Please :star: star :star: this project and help it grow! https://github.com/dgtlmoon/changedetection.io/ ```bash $ pip3 install changedetection.io ``` Specify a target for the *datastore path* with `-d` (required) and a *listening port* with `-p` (defaults to `5000`) ```bash $ changedetection.io -d /path/to/empty/data/dir -p 5000 ``` Then visit http://127.0.0.1:5000 , You should now be able to access the UI. See https://changedetection.io for more information.