AdSense Ace

ads.txt validator

Enter your domain to fetch /ads.txt, parse every line against the IAB spec, and flag any issues.

What is ads.txt?

ads.txt (Authorized Digital Sellers) is an IAB Tech Lab standard that lets publishers publicly declare which companies are authorized to sell their inventory. Google AdSense reads this file to confirm you control the site. A missing, malformed, or incorrect ads.txt can cause "Earnings at risk" warnings inside AdSense.

Each line follows this format

adSystemDomain, publisherId, relationship, certificationAuthorityId

For AdSense the line typically looks like:
google.com, pub-0000000000000000, DIRECT, f08c47fec0942fa0