Programming language: Python
License: Apache License 2.0
Tags: Misc/Other    

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Release Version Docker Pulls [License](LICENSE.md)


Self-Hosted, Open Source, Change Monitoring of Web Pages

Know when web pages change! Stay ontop of new information!

Live your data-life pro-actively instead of re-actively, do not rely on manipulative social media for consuming important information.

Open source web page monitoring, notification and change detection.


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)
  • New software releases, security advisories when you're not on their mailing list.
  • Festivals with changes
  • Realestate listing changes
  • COVID related news from government websites
  • Detect and monitor changes in JSON API responses
  • API monitoring and alerting
  • Trigger API calls via notifications when text appears on a website
  • Glue together API's using the JSON filter and JSON notifications

Need an actual Chrome runner with Javascript support? We support fetching via WebDriver!

Get monitoring now! super simple, one command!

Run the python code on your own machine by cloning this repository, or with docker and/or docker-compose



With Docker composer, just clone this repository and..

$ docker-compose up -d

Docker standalone

$ docker run -d --restart always -p "" -v datastore-volume:/datastore --name changedetection.io dgtlmoon/changedetection.io

Python Pip

Check out our pypi page https://pypi.org/project/changedetection.io/

$ pip3 install changedetection.io
$ changedetection.io -d /path/to/empty/data/dir -p 5000

Then visit , You should now be able to access the UI.

Now with per-site configurable support for using a fast built in HTTP fetcher or use a Chrome based fetcher for monitoring of JavaScript websites!

Updating changedetection.io


docker pull dgtlmoon/changedetection.io
docker kill $(docker ps -a|grep changedetection.io|awk '{print $1}')
docker rm $(docker ps -a|grep changedetection.io|awk '{print $1}')
docker run -d --restart always -p "" -v datastore-volume:/datastore --name changedetection.io dgtlmoon/changedetection.io


docker-compose pull && docker-compose up -d


Examining differences in content.

Please :star: star :star: this project and help it grow! https://github.com/dgtlmoon/changedetection.io/


ChangeDetection.io supports a massive amount of notifications (including email, office365, custom APIs, etc) when a web-page has a change detected thanks to the apprise library. Simply set one or more notification URL's in the [edit] tab of that watch.

Just some examples

rocket://user:[email protected]/#Channel
mailto://user:[email protected][email protected]

And everything else in this list!

Now you can also customise your notification content!

JSON API Monitoring

Detect changes and monitor data in JSON API's by using the built-in JSONPath selectors as a filter / selector.


This will re-parse the JSON and apply formatting to the text, making it super easy to monitor and detect changes in JSON API results


Parse JSON embedded in HTML!

When you enable a json: filter, you can even automatically extract and parse embedded JSON inside a HTML page! Amazingly handy for sites that build content based on JSON, such as many e-commerce websites.

<script type="application/ld+json">
  {"@context":"http://schema.org","@type":"Product","name":"Nan Optipro Stage 1 Baby Formula  800g","price": 23.50 }

json:$.price would give 23.50, or you can extract the whole structure


A proxy for ChangeDetection.io can be configured by setting environment the HTTP_PROXY, HTTPS_PROXY variables, examples are also in the docker-compose.yml

NO_PROXY exclude list can be specified by following "localhost,"

as docker run with -e

docker run -d --restart always -e HTTPS_PROXY="socks5h://" -p "" -v datastore-volume:/datastore --name changedetection.io dgtlmoon/changedetection.io

With docker-compose, see the Proxy support example in docker-compose.yml.

For more information see https://docs.python-requests.org/en/master/user/advanced/#proxies

This proxy support also extends to the notifications https://github.com/caronc/apprise/issues/387#issuecomment-841718867

RaspberriPi support?

RaspberriPi and linux/arm/v6 linux/arm/v7 arm64 devices are supported!

Windows native support?

Sorry not yet :( https://github.com/dgtlmoon/changedetection.io/labels/windows

Support us

Do you use changedetection.io to make money? does it save you time or money? Does it make your life easier? less stressful? Remember, we write this software when we should be doing actual paid work, we have to buy food and pay rent just like you.

Please support us, even small amounts help a LOT.

BTC 1PLFN327GyUarpJd7nVe7Reqg9qHx5frNn

*Note that all licence references and agreements mentioned in the changedetection.io README section above are relevant to that project's source code only.