Being a privacy-focused web developer, I have found Signatu Trackerdetect useful for finding out the third-party trackers on my websites. By default, it browses through websites and identifies cookies, scripts, tracking pixels, and iFrames related to over 500 trackers. Review collected by and hosted on G2.com.

I often had situations that make me think it was not quite accurate, sometimes it was dead-on but many times, it was way off. It labels a lot of website functionalities as trackers, which users then have to manually try and tell apart from real trackers. Review collected by and hosted on G2.com.