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Live data
Blocks an AI crawler 10%Blocks GPTBot 9.6%ads.txt 22%Cookie consent banner 19%Ad pixels 23%llms.txt 15%HTTPS homepage 98%DMARC record 64%Blocks an AI crawler 10%Blocks GPTBot 9.6%ads.txt 22%Cookie consent banner 19%Ad pixels 23%llms.txt 15%HTTPS homepage 98%DMARC record 64%
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Runs in your browserSEO & publishing

ads.txt validator

Paste the file content; every problem is listed with its line number.

Runs locally — nothing is uploaded
Result
Nothing yet — enter data or press Example.

How to use

  1. 1Open yoursite/ads.txt and paste its content.
  2. 2Fix every error first, then the warnings.
  3. 3Upload the corrected file to the site root.

The ad system domain, your seller account ID, the relationship (DIRECT or RESELLER) and optionally the certification authority ID.

Buyers skip lines they cannot parse, so that inventory may look unauthorised.

Got a story or an ad stack to fix?

Write to the desk — we reply within one business day.