ads.txt Validator

IAB-compliant ads.txt file validator

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Full guide

How to Validate an ads.txt File for IAB Compliance

Learn how ads.txt works, how DIRECT and RESELLER records differ, what domains and IDs must look like, and how to catch common formatting errors before go-live.

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About ads.txt Validator

Check your ads.txt file for proper IAB Tech Lab compliance. Validates each record for correct domain, account ID, and seller type (DIRECT/RESELLER) fields. Detects unknown variables, invalid domains, and missing fields. Counts unique domains and record statistics.

ads.txt Validator Features

  • IAB record validation
  • DIRECT/RESELLER checking
  • Domain validation
  • 100% private and client-side processing

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