With Ads.txt Checker you can find out if a site is using ads.txt file and have all the Authorized Digital Sellers shown in a pop up
With Ads.txt Checker you can find out if a site is using an ads.txt file and by simply clicking the icon have all the Authorized Digital Sellers presented in a pop up.
As mention in the IAB website, ads.txt initiative specifies a mechanism for publishers to list their authorized digital sellers, in order to fight against fraud and misrepresented domains.