Change Detection

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Easily add the current web-page from your browser directly into your changedetection.io tool, more great features coming soon!

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General
Notifications
Fetching
Global Filters
API
CAPTCHA & Proxies

Time Between Check

Weeks
Days
Hours
Minutes
Seconds

Default recheck time for all watches, current system minimum is 3 seconds (more info).

Random jitter seconds ± check

Example - 3 seconds random jitter could trigger up to 3 seconds earlier or up to 3 seconds later

Number of times the filter can be missing before sending a notification

After this many consecutive times that the CSS/xPath filter is missing, send a notification
Set to 0 to disable

Password

Password protection for your changedetection.io application.

Allow access to view diff page when password is enabled

Allow access to view watch diff page when password is enabled (Good for sharing the diff page)

Pager size

Number of items per page in the watch overview list, 0 to disable.

Extract <title> from document and use as watch title

Note: This will automatically apply to all existing watches.

Treat empty pages as a change?

When a page contains HTML, but no renderable text appears (empty page), is this considered a change?

Notification URL List

Use AppRise URLs for notification to just about any service! Please read the notification services wiki here for important configuration notes.
discord:// (or https://discord.com/api/webhooks...)) only supports a maximum 2,000 characters of notification text, including the title.
tgram:// bots can't send messages to other bots, so you should specify chat ID of non-bot user.
tgram:// only supports very limited HTML and can fail when extra tags are sent, read more here (or use plaintext/markdown format)
gets://, posts://, puts://, deletes:// for direct API calls (or omit the "s" for non-SSL ie get://) more help here
Accepts the {{token}} placeholders listed below

Send test notification Notification debug logs

Notification Title

Title for all notifications

Notification Body

Body for all notifications ‐ You can use Jinja2 templating in the notification title, body and URL, and tokens from below.

Show token/placeholders

Token	Description
`{{base_url}}`	The URL of the changedetection.io instance you are running.
`{{watch_url}}`	The URL being watched.
`{{watch_uuid}}`	The UUID of the watch.
`{{watch_title}}`	The title of the watch.
`{{watch_tag}}`	The watch label / tag
`{{preview_url}}`	The URL of the preview page generated by changedetection.io.
`{{diff_url}}`	The URL of the diff output for the watch.
`{{diff}}`	The diff output - only changes, additions, and removals
`{{diff_added}}`	The diff output - only changes and additions
`{{diff_removed}}`	The diff output - only changes and removals
`{{diff_full}}`	The diff output - full difference output
`{{diff_patch}}`	The diff output - patch in unified format
`{{current_snapshot}}`	The current snapshot text contents value, useful when combined with JSON or CSS filters
`{{triggered_text}}`	Text that tripped the trigger from filters

Warning: Contents of {{diff}}, {{diff_removed}}, and {{diff_added}} depend on how the difference algorithm perceives the change.
For example, an addition or removal could be perceived as a change in some cases. More Here

For JSON payloads, use |tojson without quotes for automatic escaping, for example - { "name": {{ watch_title|tojson }} }

URL encoding, use |urlencode, for example - gets://hook-website.com/test.php?title={{ watch_title|urlencode }}

Notification format

Format for all notifications

Notification base URL override

Base URL used for the {{ base_url }} token in notification links.
Default value is the system environment variable 'BASE_URL' - read more here.

Fetch Method

Basic fast Plaintext/HTTP Client
Playwright Chromium/Javascript via 'ws://playwright-chrome:3000'

Use the Basic method (default) where your watched sites don't need Javascript to render.

The Chrome/Javascript method requires a network connection to a running WebDriver+Chrome server, set by the ENV var 'WEBDRIVER_URL'.

If you're having trouble waiting for the page to be fully rendered (text missing etc), try increasing the 'wait' time here.
This will wait n seconds before extracting the text.

Wait seconds before extracting text

Default User-Agent overrides

Plaintext requests
Chrome requests

Applied to all requests.

Note: Simply changing the User-Agent often does not defeat anti-robot technologies, it's important to consider all of the ways that the browser is detected.

Tip: Connect using Bright Data and Oxylabs Proxies, find out more here.

Ignore whitespace

Ignore whitespace, tabs and new-lines/line-feeds when considering if a change was detected.
Note: Changing this will change the status of your existing watches, possibly trigger alerts etc.

Render anchor tag content

Render anchor tag content, default disabled, when enabled renders links as (link text)[https://somesite.com]
Note: Changing this could affect the content of your existing watches, possibly trigger alerts etc.

Remove elements

Remove HTML element(s) by CSS selector before text conversion.
Add multiple elements or CSS selectors per line to ignore multiple parts of the HTML.

Ignore Text

Note: This is applied globally in addition to the per-watch rules.

Note: This is applied globally in addition to the per-watch rules.
Each line processed separately, any line matching will be ignored (removed before creating the checksum)
Regular Expression support, wrap the entire line in forward slash /regex/
Changing this will affect the comparison checksum which may trigger an alert
Use the preview/show current tab to see ignores

API Access

Drive your changedetection.io via API, More about API access here

API access token security check enabled

Restrict API access limit by using x-api-key header - required for the Chrome Extension to work

API Key be238bdf2e293e5cb03d72d4b1e9c2a6

Regenerate API key

Chrome Extension

Easily add any web-page to your changedetection.io installation from within Chrome.

Step 1 Install the extension, Step 2 Navigate to this page, Step 3 Open the extension from the toolbar and click "Sync API Access"

Chrome Webstore

BrightData offer world-class proxy services, "Data Center" proxies are a very affordable way to proxy your requests, whilst WebUnlocker can help solve most CAPTCHAs.

BrightData offer many many different types of proxies, it is worth reading about what is best for your use-case.

When you have registered, enabled the required services, visit the API example page, then select Python, set the country you wish to use, then copy+paste the access Proxy URL into the "Extra Proxies" boxes below.

The Proxy URL with BrightData should start with http://brd-customer...

When you sign up using https://brightdata.grsm.io/n0r16zf7eivq BrightData will match any first deposit up to $150

Collect public data at scale with industry-leading web scraping solutions and the world’s largest ethical proxy network.

Oxylabs also provide a WebUnlocker proxy that bypasses sophisticated anti-bot systems, so you don’t have to.

Serve over 195 countries, providing Residential, Mobile and ISP proxies and much more.

Use the promo code boost35 with this link https://oxylabs.go2cloud.org/SH2d for 35% off Residential, Mobile proxies, Web Unblocker, and Scraper APIs. Built-in proxies enable you to access data from all around the world and help overcome anti-bot solutions.

Your proxy provider may need to whitelist our IP of 204.15.192.195

Tip: "Residential" and "Mobile" proxy type can be more successfull than "Data Center" for blocked websites.

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"Name" will be used for selecting the proxy in the Watch Edit settings
SOCKS5 proxies with authentication are only supported with 'plain requests' fetcher, for other fetchers you should whitelist the IP access instead

Extra Browsers can be attached to further defeat CAPTCHA's on websites that are particularly hard to scrape.
Simply paste the connection address into the box, More instructions and examples here

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