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## Web Site Change Detection, Monitoring and Notification.
## Self-hosted open source change monitoring of web pages.
Live your data-life pro-actively, track website content changes and receive notifications via Discord, Email, Slack, Telegram and 70+ more
_Know when web pages change! Stay ontop of new information!_
[<img src="https://raw.githubusercontent.com/dgtlmoon/changedetection.io/master/docs/screenshot.png" style="max-width:100%;" alt="Self-hosted web page change monitoring" title="Self-hosted web page change monitoring" />](https://lemonade.changedetection.io/start)
Live your data-life *pro-actively* instead of *re-actively*, do not rely on manipulative social media for consuming important information.
<imgsrc="https://raw.githubusercontent.com/dgtlmoon/changedetection.io/master/screenshot.png"style="max-width:100%;"alt="Self-hosted web page change monitoring"title="Self-hosted web page change monitoring"/>
**Get your own private instance now! Let us host it for you!**
[**Try our $6.99/month subscription - unlimited checks, watches and notifications!**](https://lemonade.changedetection.io/start), choose from different geographical locations, let us handle everything for you.
[**Don't have time? Let us host it for you! try our extremely affordable subscription use our proxies and support!**](https://lemonade.changedetection.io/start)
#### Example use cases
Know when ...
- Government department updates (changes are often only on their websites)
- Local government news (changes are often only on their websites)
- Products and services have a change in pricing
- _Out of stock notification_ and _Back In stock notification_
- 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
- API monitoring and alerting
- 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)
_Need an actual Chrome runner with Javascript support? We support fetching via WebDriver and Playwright!</a>_
#### 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 and CSS Selectors, Easily monitor complex JSON with JsonPath rules
- Switch between fast non-JS and Chrome JS based "fetchers"
- 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
dgtlmoon
2 years ago