Your files stay on your device

Ads.txt validator

Paste an ads.txt file and get per-record IAB spec checks for syntax, comments and duplicate seller records.

Paste an ads.txt file to check its records.

This is a structure check against the IAB Tech Lab record shape: field order, DIRECT and RESELLER types, the optional certification authority ID, comments, and duplicate seller entries. A well-formed file is not a proof of authorization. It only means the lines parse. To confirm a seller actually represents you, look the account ID up with the exchange named on the line. The file is checked as pasted, so if your server answers with an HTML error page instead of plain text, that will not show up here.
Options

More web & auth tools

- robots.txt tester (/web/robots)
- HTTP header parser (/web/headers)
- Cookie analyzer (/web/cookie)
All web & auth tools (/web)

Was this tool useful?
YesNo

Canonical HTML: https://nutter.tools/web/ads-txt-checker
Markdown version: https://nutter.tools/web/ads-txt-checker.md
Plain-text version: https://nutter.tools/web/ads-txt-checker.txt
Agent index: https://nutter.tools/llms.txt