I am using this specifically for checking the status of a Facebook conversion tracking pixel to see if it is implemented on the website or not but you can use this to verify Analytics tracking or any other kind of tracking code. You want to install a Google Chrome extension called Ghostery, which is also available for Firefox, Opera, Safari and Internet Explorer.
Ghostery for Google Chrome:
Download Ghostery for Firefox, Opera, Safari or Internet Explorer:
After you’ve installed it, go ahead and navigate to your website and then click on the blue ghost icon. If your tracking code is implemented on your website, it will display. If it does not display, that means the tracking code is from a vendor not detected by Ghostery or it isn’t implemented correctly. The latter is more likely since their database is relatively comprehensive.