ads.txt Validator
Check your domain's ads.txt file for syntax errors and IAB compliance.
Ads.txt Inspector
Validate your domain's ads.txt file against IAB Tech Lab specifications to prevent ad fraud and revenue loss.
Enter a domain above to fetch and analyze its ads.txt file.
What is ads.txt?
ads.txt (Authorized Digital Sellers) is an IAB initiative that helps publishers declare who is authorized to sell their digital ad inventory. By creating a public record of authorized digital sellers, ads.txt creates greater transparency in the programmatic supply chain.
Required Syntax
Each line in an ads.txt file requires at least 3 comma-separated fields:
- Domain of the advertising system: The canonical domain name of the SSP, Exchange, or header wrapper system (e.g.,
google.com). - Publisher's Account ID: The identifier associated with the seller or publisher account within the advertising system (e.g.,
pub-123456789). - Type of Account: Must be either
DIRECTorRESELLER. - Certification Authority ID (Optional): An ID that uniquely identifies the advertising system within a certification authority (e.g., TAG ID).
google.com, pub-123456789, DIRECT, f08c47fec0942fa0
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