Ads.txt Validator
Validate your ads.txt file to prevent ad fraud and ensure authorized sellers are properly declared.
Validate Configuration
What is Ads.txt?
Ads.txt (Authorized Digital Sellers) is an IAB initiative that helps ensure your digital ad inventory is only sold through sellers (such as AdSense) whom you've identified as authorized. It's a simple text file that prevents unauthorized sellers from spoofing your domain.
- Direct Sellers: Accounts you own and control directly.
- Authorized Resellers: Third-party companies authorized to sell your inventory.
- Transparency: Gives advertisers confidence that they are buying genuine inventory.
Why Ads.txt Validator is Essential
Incorrectly formatted records in your ads.txt file can lead to significant revenue loss. If an ad buyer cannot verify that a seller is authorized, they may choose not to bid on your inventory. This tool ensures your file is correctly named, located at the root, and follows the correct syntax.
Ads.txt is a simple, elegant, and secure method to declare who is authorized to sell your inventory, protecting both buyers and sellers from fraud.
Best Practices for Ads.txt
Maintain your authorized sellers list with these standards:
- Regular Updates: Audit your list whenever you add or remove an advertising partner.
- Root Domain Only: Ensure the file is at
example.com/ads.txt, not in a folder or subdomain. - Syntax Accuracy: Each line must follow the
domain, publisher-id, relationship, [cert-id]format. - Redirect Logic: If using a redirect, ensure it terminates in a valid ads.txt file at the final destination.
Standard Format Example
Your entries should look like this (comments are allowed with #):
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