Nearly three years ago we launched Blacklight, an online tool that allows users to enter any website and find out what tracking technologies are present and who gets the visitor data they collect. This month, Blacklight hit a significant milestone: The tool has successfully conducted more than 10 million scans. Seven million of those scans were completed in just this past year. Blacklight was created with one guiding premise: that it would be more powerful to show people, in real time, how they were being tracked online than to merely tell them such tracking was happening. Led by former Markup senior data engineer Surya Mattu, a team of programmers and journalists spent 18 months building Blacklight and released it in conjunction with a Markup story. Surya and investigative reporter Aaron Sankin scanned 80,000 popular websites with Blacklight and found that nearly 90 percent of them had some sort of third-party tracker. Aaron also published a guide for readers on what to do if, after using Blacklight to scan a website, you find the results to be horrifying. In addition to going to our Blacklight tool and typing in the website you want to scan, it’s also possible to access Blacklight programmatically, which is what Surya and Aaron did to scan those 80,000 websites. While we haven’t written official documentation on how to do this, we believe people are already using Blacklight to conduct automated scans on websites at a large scale. If you currently work with Blacklight in this way, or are interested in doing so, we’d love to hear from you as we think about what’s next for Blacklight: hello@themarkup.org. Use Blacklight at scale If you currently use Blacklight in this way, or are interested in doing so, we’d love to hear from you as we think about what’s next for Blacklight: hello@themarkup.org. Projects That Have Used Blacklight to Hold Tech Accountable To recognize this month’s milestone, we want to highlight just a few of the projects that have used Blacklight: Alexis R. Rosenblat used it to check patient intake software for STAT news
The Opioid Policy Institute and Legal Action Center found addiction treatment and recovery sites tracking users
ProPublica saw trackers on the sites of online pharmacies that sell abortion medication
Human Rights Watch caught ed tech violating children’s privacy
Organizations including the Electronic Frontier Foundation and ProtonVPN celebrated their privacy performance in Blacklight scans of their own sites
Velislava Hillman used it to scan an ed tech site
Mikal Jakubal found articles about trackers loaded with trackers
Numerous academic studies, from measuring ed tech privacy standards to analyzing health-related sites, and much more. The pervasiveness of the tracking uncovered by Blacklight can feel daunting. But, like other Markup tools that followed, Blacklight gives people some degree of control over how they engage with the digital world. As Surya said at the time of Blacklight’s launch, “We want readers to have a sense of agency—not apathy.” Let us know Have you used Blacklight to scan a site for yourself? Let us know what you found at hello@themarkup.org. By Maria Puertas Also published here Photo by Timothy Dykes on Unsplash Nearly three years ago we launched Blacklight , an online tool that allows users to enter any website and find out what tracking technologies are present and who gets the visitor data they collect. Blacklight This month, Blacklight hit a significant milestone: The tool has successfully conducted more than 10 million scans. Seven million of those scans were completed in just this past year. Blacklight was created with one guiding premise: that it would be more powerful to show people, in real time, how they were being tracked online than to merely tell them such tracking was happening. Led by former Markup senior data engineer Surya Mattu, a team of programmers and journalists spent 18 months building Blacklight and released it in conjunction with a Markup story. spent 18 months building Blacklight Surya and investigative reporter Aaron Sankin scanned 80,000 popular websites with Blacklight and found that nearly 90 percent of them had some sort of third-party tracker. Aaron also published a guide for readers on what to do if, after using Blacklight to scan a website, you find the results to be horrifying. scanned 80,000 popular websites what to do In addition to going to our Blacklight tool and typing in the website you want to scan, it’s also possible to access Blacklight programmatically, which is what Surya and Aaron did to scan those 80,000 websites. While we haven’t written official documentation on how to do this, we believe people are already using Blacklight to conduct automated scans on websites at a large scale. If you currently work with Blacklight in this way, or are interested in doing so, we’d love to hear from you as we think about what’s next for Blacklight: hello@themarkup.org . hello@themarkup.org Use Blacklight at scale If you currently use Blacklight in this way, or are interested in doing so, we’d love to hear from you as we think about what’s next for Blacklight: hello@themarkup.org . hello@themarkup.org Projects That Have Used Blacklight to Hold Tech Accountable To recognize this month’s milestone, we want to highlight just a few of the projects that have used Blacklight: Alexis R. Rosenblat used it to check patient intake software for STAT news The Opioid Policy Institute and Legal Action Center found addiction treatment and recovery sites tracking users ProPublica saw trackers on the sites of online pharmacies that sell abortion medication Human Rights Watch caught ed tech violating children’s privacy Organizations including the Electronic Frontier Foundation and ProtonVPN celebrated their privacy performance in Blacklight scans of their own sites Velislava Hillman used it to scan an ed tech site Mikal Jakubal found articles about trackers loaded with trackers Numerous academic studies, from measuring ed tech privacy standards to analyzing health-related sites, and much more. Alexis R. Rosenblat used it to check patient intake software for STAT news check patient intake software The Opioid Policy Institute and Legal Action Center found addiction treatment and recovery sites tracking users The Opioid Policy Institute Legal Action Center found ProPublica saw trackers on the sites of online pharmacies that sell abortion medication saw trackers Human Rights Watch caught ed tech violating children’s privacy ed tech violating children’s privacy Organizations including the Electronic Frontier Foundation and ProtonVPN celebrated their privacy performance in Blacklight scans of their own sites the Electronic Frontier Foundation ProtonVPN Velislava Hillman used it to scan an ed tech site scan an ed tech site Mikal Jakubal found articles about trackers loaded with trackers loaded with trackers Numerous academic studies, from measuring ed tech privacy standards to analyzing health-related sites , and much more . measuring ed tech privacy standards analyzing health-related sites and much more The pervasiveness of the tracking uncovered by Blacklight can feel daunting. But, like other Markup tools that followed, Blacklight gives people some degree of control over how they engage with the digital world. As Surya said at the time of Blacklight’s launch, “We want readers to have a sense of agency—not apathy.” other Markup tools Let us know Have you used Blacklight to scan a site for yourself? Let us know what you found at hello@themarkup.org . hello@themarkup.org By Maria Puertas By Maria Puertas Maria Puertas Also published here Also published here here Photo by Timothy Dykes on Unsplash Photo by Timothy Dykes on Unsplash Timothy Dykes Unsplash

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