> Paste an App Store or Google Play link to check the app's app-ads.txt against ad systems' sellers.json: inconsistent DIRECT lines, unknown seller IDs, dead domains and more.

Source: https://appsupplyindex.com/check · Updated: 2026-10-07 · License: CC BY 4.0 (App Supply Index)

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# Free app-ads.txt checker

Paste an App Store or Google Play link. We fetch the app's app-ads.txt and check every line against
the ad systems' sellers.json, with the same checks as the index.

Usually a few seconds; very large files can take up to 30.

Results are automated observations of public files. They
describe file contents, not the intent or conduct of any company. We record which apps are checked, not who
checked them. Limit: 20 checks per hour.