What is ads.txt (and why AdSense cares)?
A clear explanation of ads.txt, where it lives, and how it helps prevent ad fraud.
Read more →Dr Ads.txt — check & create
Two fast tools: check ads.txt or generate a clean file for AdSense.
Articles & guides
Short guides to help you fix ads.txt fast.
AdSense ads.txt example (DIRECT vs RESELLER)
Learn the correct AdSense line and when DIRECT or RESELLER is used.
Read more →Common ads.txt mistakes that break monetization
Fix typos, wrong pub IDs, bad formatting, and hosting the file in the wrong place.
Read more →Frequently asked questions
Quick answers about ads.txt and app-ads.txt (AdSense-friendly).
Where should ads.txt be placed?
ads.txt must be accessible at the root of your domain: https://yourdomain.com/ads.txt (not in a subfolder).
What is the correct AdSense line?
A common AdSense entry looks like: google.com, pub-XXXXXXXXXXXXXXX, DIRECT, f08c47fec0942fa0 (replace with your real pub ID).
DIRECT vs RESELLER — what should I use?
Use DIRECT when you work directly with the ad platform (e.g., your own AdSense account). Use RESELLER only if a partner network sells inventory on your behalf.
How long does it take for AdSense to recognize updates?
After updating ads.txt, it can take hours (sometimes longer) for crawlers to refresh. Re-check the file and consider purging CDN cache.
My ads.txt returns 403 or 404 — what can I do?
404 means the file isn't in the correct place. 403 means it's blocked by server rules/WAF/CDN. Make sure the file is public and not protected.
Do subdomains need a separate ads.txt?
If you serve ads on a subdomain, it should also have its own ads.txt at https://sub.yourdomain.com/ads.txt unless your setup intentionally consolidates inventory elsewhere.
What is app-ads.txt and where do I host it?
app-ads.txt is for mobile apps. It is hosted on your developer website domain at https://yourdomain.com/app-ads.txt and helps verify authorized sellers for app inventory.