Get your ads.txt right the first time.

Free tools to validate, check and generate ads.txt and app-ads.txt files, plus plain-language guides for AdSense publishers.

# a correct AdSense line
google.com, pub-0000000000000000, DIRECT, f08c47fec0942fa0

Why ads.txt matters

ads.txt is a public list of the companies allowed to sell ads on your website. Advertisers check it before they buy, so a missing or broken file can mean fewer bids and lower earnings, and in Google AdSense it triggers an “Earnings at risk” alert. Most problems come from small mistakes: a wrong folder, a typo in a publisher ID, a server that returns a web page instead of the file. Our tools find these in seconds, and our guides explain how to fix them on WordPress, Blogger and common hosting panels.

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