Monitor websites for changes at ChangeDetection.com

runs as Online Service
screenshot of ChangeDetection.com

Sometimes, it's what remains constant that's interesting to us. Other times, we're more interested in what's different. RSS feeds are built with this in mind: any time there's a new blog post or breaking news story, we can find out by subscribing to the right feed. But sometimes we're interested in things that we can't get through a feed. In situations like this, it's handy to have a tool that monitors a website for us, letting us know when something has changed there.

ChangeDetection.com is a website monitoring tool like this. All you need to do is give them a URL and an email address. They'll monitor that page, and whenever it changes, they'll shoot you an email letting you know about it. Conversely, if you've got a website that people are interested in (that's why you have it, right?) but don't supply an RSS feed, these guys give you a snippet of code you can paste into your page that will let your visitors monitor your site for changes. They go out and check pages about once a day, so this isn't a viable substitute for any kind of real-time information, but for stuff that changes less often, it might be just enough to keep you in the loop.

These guys have been doing this for free since 1999, so they must be doing a pretty good job. You don't need to sign up to use the service, although you can, and it should be compatible with just about any web browser. And of course, you'll need an email address if they're going to send you a note about what is going on.

Download ChangeDetection.com

2 Responses to “Monitor websites for changes at ChangeDetection.com”

  1. Firefox has several addons that do the same job and, more importantly, can check pages that require you to be logged in.

    Check4Change:
    https://addons.mozilla.org/en-US/firefox/addon/3028

    AlertBox:
    https://addons.mozilla.org/en-US/firefox/addon/13587

    SiteDelta:
    https://addons.mozilla.org/en-US/firefox/addon/4337

    As a past user of Check4Change and a longtime user of SiteDelta, I can say that Check4Change is best for people who just want to see when a page changes, while SiteDelta is best for people who want fine-grained control over what gets checked for changes and when.

  2. Teri Greene says:

    I’ve used changedetection.com for several years, on dozens of websites. Using it or one of the other sites may be a better idea than using a Firefox add-on, more add-ons slow down the browser.